{"listingPage":true,"listingPagePreloaded":true,"params":{"locale":"en","controller":"listing_page","action":"index","parent_category_slug":"ammonoids","file_types":null},"browser_attributes":{"title":"Free \u0026 Premium Ammonoids 3D Models","description":"46 3D Ammonoids models available for download. 3D Ammonoids models are ready for animation, games and VR / AR projects. Use filters to find rigged, animated, low-poly or free 3D models. Available in any file format including FBX, OBJ, MAX, 3DS, C4D","free_to_premium":{"prefix":"Do you need something special? You can find better quality","main":"ammonoids 3D models","postfix":"in the premium listing."},"thumbnails":null,"bottomDescription":false,"pathName":"/3d-models","breadcrumbs":"\u003cdiv class=\"container\"\u003e\u003cul class=\"breadcrumb\" itemtype=\"https://schema.org/BreadcrumbList\" itemscope=\"itemscope\"\u003e\u003cli itemprop=\"itemListElement\" itemscope=\"itemscope\" itemtype=\"http://schema.org/ListItem\" class=\"breadcrumb__item\"\u003e\u003ca itemtype=\"http://schema.org/Thing\" itemprop=\"item\" itemscope=\"itemscope\" title=\"3D Models\" id=\"3858e7f292e7f8ee605c5fad094ed100\" href=\"https://www.cgtrader.com/3d-models\"\u003e\u003cspan itemprop=\"name\"\u003e3D Models\u003c/span\u003e\u003c/a\u003e\u003cmeta itemprop=\"position\" content=\"1\" /\u003e\u003c/li\u003e\u003cli itemprop=\"itemListElement\" itemscope=\"itemscope\" itemtype=\"http://schema.org/ListItem\" class=\"breadcrumb__item\"\u003e\u003cspan itemtype=\"http://schema.org/Thing\" itemprop=\"item\" itemscope=\"itemscope\"\u003e\u003cspan itemprop=\"name\"\u003eAmmonoids  3D models\u003c/span\u003e\u003c/span\u003e\u003cmeta itemprop=\"position\" content=\"2\" /\u003e\u003c/li\u003e\u003c/ul\u003e\u003c/div\u003e","breadcrumbsType":"Browse by type","rootPath":"/3d-models/ammonoids","validBrowserType":[{"tag":"Rigged Ammonoids","category_url":"/rigged-3d-models/ammonoids"},{"tag":"3D printed Ammonoids","category_url":"/3d-print-models/ammonoids"}],"relatedTagsUrlWithoutTag":"https://www.cgtrader.com/3d-models","currentProductType":"cg","searchingFree":false,"isTopBannerVisible":true},"tags":[["shell",{"thumbnailUrl":"https://media.cgtrader.com/variants/zfPvDcpBdXSHVS2PSox3xtGM/0614d84bdc59a9966ecae828cdf598d52b24aff775161cff6edd2989d8b52400/1.jpg"}],["fossil",{"thumbnailUrl":"https://media.cgtrader.com/variants/soq13FizCBrAq5ehEcxbjPRx/0614d84bdc59a9966ecae828cdf598d52b24aff775161cff6edd2989d8b52400/pro-lomont-fossils-sculpture-3d-model-max-obj-fbx.jpg"}],["paleontology",{"thumbnailUrl":"https://media.cgtrader.com/variants/3i9f69S8FF9LmV9sWecPfp7U/32d69f4c24e98012509fbe07e0c3cba3db52c110c584bf0d90d37cc033ef0b38/M32.png"}],["conch",{"thumbnailUrl":"https://media.cgtrader.com/variants/1rGRvF1r8c5DCaEckd256iJR/0614d84bdc59a9966ecae828cdf598d52b24aff775161cff6edd2989d8b52400/6-sea-shell-collection-photorealistic-3d-model-low-poly-fbx.jpg"}],["marine",{"thumbnailUrl":"https://media.cgtrader.com/variants/zX5wbPnpLnhybNs93CsYArEY/32d69f4c24e98012509fbe07e0c3cba3db52c110c584bf0d90d37cc033ef0b38/A1_Presupported.png"}],["seashell",{"thumbnailUrl":"https://media.cgtrader.com/variants/zfPvDcpBdXSHVS2PSox3xtGM/0614d84bdc59a9966ecae828cdf598d52b24aff775161cff6edd2989d8b52400/1.jpg"}],["ammonite",{"thumbnailUrl":"https://media.cgtrader.com/variants/HTcLavr3TKUs56vXm1M4u6WK/0614d84bdc59a9966ecae828cdf598d52b24aff775161cff6edd2989d8b52400/nautilus-belauensis-3d-model-low-poly-animated-rigged-obj-mtl-fbx-c4d-blend.jpg"}],["cephalopod",{"thumbnailUrl":"https://media.cgtrader.com/variants/RoGadgmtB38fpioAMS1dfwWB/32d69f4c24e98012509fbe07e0c3cba3db52c110c584bf0d90d37cc033ef0b38/TENTACLES_productthumbnail_square.png"}],["spiral",{"thumbnailUrl":"https://media.cgtrader.com/variants/LhNqEtJHFn8txu2jT19aAdPt/3f223245f7bf85c38047ea969bc08e306a91b3438ff89828ac73f8fa8aaede2e/corkscrew-3d-model-obj-blend.jpeg"}],["animal",{"thumbnailUrl":"https://media.cgtrader.com/variants/a4XKRetEUwBcvBZVeJLLdXgD/0614d84bdc59a9966ecae828cdf598d52b24aff775161cff6edd2989d8b52400/JF0K801A0_GermanShepherd_Display_Stand_02.jpg"}],["print",{"thumbnailUrl":"https://media.cgtrader.com/variants/pY9kn58onMnmqDYRawCdoVjh/0614d84bdc59a9966ecae828cdf598d52b24aff775161cff6edd2989d8b52400/Moss_Scene_G_Moss_CC.jpg"}],["biology",{"thumbnailUrl":"https://media.cgtrader.com/variants/aediayiFT3dbFow5NtB3ULa5/0614d84bdc59a9966ecae828cdf598d52b24aff775161cff6edd2989d8b52400/Biological%20Cover.jpg"}]],"seo_tags":[{"key":"Ammonoids","tag":"ammonoids","count":0,"show":true},{"key":"Shell","tag":"shell","count":45,"show":true},{"key":"Fossil","tag":"fossil","count":43,"show":true},{"key":"Paleontology","tag":"paleontology","count":43,"show":true},{"key":"Ammonoid","tag":"ammonoid","count":41,"show":true},{"key":"Conch","tag":"conch","count":41,"show":true},{"key":"Model","tag":"model","count":41,"show":true},{"key":"Marine","tag":"marine","count":38,"show":true}],"is_mobile_s_s_r":false,"data":[{"id":"5769103","type":"listingItem","attributes":{"id":5769103,"title":"Ammonite - Ammonoids - simple","price":9.41,"description":"Ammonita model - a sub -party of extinct cephalopods (cephalopoda). Their shells occur in the rocks of maritime origin from the period from Dewon to the end of Cretaceous.\nThe model contains a version with the body (tentacles) and an empty shell\n\nNote - the model is not adapted for 3D printing, in my other projects you will find a version specially prepared for 3D printing","imageAlt":"3D model Ammonite - Ammonoids - simple","url":"https://www.cgtrader.com/3d-models/animal/other/ammonite-ammonoids-simple","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/myhfhd6qchJfAumFDDkwgjN5/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/3.jpg","gridUrl":"https://media.cgtrader.com/variants/myhfhd6qchJfAumFDDkwgjN5/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/3.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/ammonite-ammonoids-simple","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":true,"lowPoly":false}},"metaverseFormatsList":[{"id":21,"name":".blend","is_native":true},{"id":5,"name":".fbx","is_native":false},{"id":12,"name":".obj","is_native":false},{"id":216,"name":".jpg","is_native":false},{"id":215,"name":".png","is_native":false},{"id":51,"name":".stl","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5769103/5ccc622fd6/ammonite-ammonoids-simple-3d-model-5ccc622fd6.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":true,"subscriptionPotential":false,"subscriptionTierBand":"essentials"}},{"id":"5732885","type":"listingItem","attributes":{"id":5732885,"title":"Ammonite - Ammonoids print","price":4.88,"description":"Ammonita model - a sub -party of extinct cephalopods (cephalopoda). Their shells occur in the rocks of maritime origin from the period from Dewon to the end of Cretaceous.\n\nThe model is best printed in the resin. It has no scale - print in the size you need. Two variants - with body and tentacles and with an empty shell. The Amo-ALL file has a dense mesh, if you have a problem with it, use AMO1 and AMO2","imageAlt":"3D printable model Ammonite - Ammonoids print","url":"https://www.cgtrader.com/3d-print-models/science/biology/ammonite-ammonoids-print","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/Gvjka4gbdUF4L1DH4NMacURJ/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/1.jpg","gridUrl":"https://media.cgtrader.com/variants/Gvjka4gbdUF4L1DH4NMacURJ/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/1.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-print-models/science/biology/ammonite-ammonoids-print","isCgtVerified":false,"types":{"printReady":true,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":12,"name":".obj","is_native":false},{"id":51,"name":".stl","is_native":false},{"id":5,"name":".fbx","is_native":false}],"categorySlug":"science","subcategorySlug":"biology","categoryTitle":"Science","subcategoryTitle":"Biology","schemaImageUrl":"https://img-new.cgtrader.com/items/5732885/2ef45e70a4/ammonite-ammonoids-print-3d-model-2ef45e70a4.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":true,"subscriptionPotential":false,"subscriptionTierBand":"essentials"}},{"id":"5804521","type":"listingItem","attributes":{"id":5804521,"title":"Ammonite - amonoids - three different","price":17.89,"description":"Ammonita model - a sub -party of extinct cephalopods (cephalopoda). \nThree different shapes and colors\nTheir shells occur in the rocks of maritime origin from the period from Dewon to the end of Cretaceous.\nThe model contains a version with the body (tentacles) and an empty shell.\n\nNote - the model is not adapted for 3D printing, in my other projects you will find a version specially prepared for 3D printing","imageAlt":"Ammonite - amonoids - three different 3D model","url":"https://www.cgtrader.com/3d-models/animal/other/ammonite-amonoids-three-different","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/RyvAHYSKoaX3BXAmsCdzacEs/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/1.jpg","gridUrl":"https://media.cgtrader.com/variants/RyvAHYSKoaX3BXAmsCdzacEs/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/1.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/ammonite-amonoids-three-different","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":true,"lowPoly":false}},"metaverseFormatsList":[{"id":21,"name":".blend","is_native":true},{"id":51,"name":".stl","is_native":false},{"id":5,"name":".fbx","is_native":false},{"id":12,"name":".obj","is_native":false},{"id":216,"name":".jpg","is_native":false},{"id":215,"name":".png","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5804521/8ae4b6bea2/ammonite-amonoids-three-different-3d-model-8ae4b6bea2.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":true,"subscriptionPotential":false,"subscriptionTierBand":"premium"}},{"id":"5571481","type":"listingItem","attributes":{"id":5571481,"title":"Subevolute Ammonoid shell with spines","price":15.0,"description":"This model emulates a subevolute ammonoid conch, displaying ventro-lateral spines. In subevolute ammonoids, the whorls are loosely coiled, leading to a shell design where the umbilicus— the central depression of the shell where the whorls meet—is relatively exposed. This results in a more large and somewhat compressed overall shell form, enhancing the conch's streamlined profile. The design of this subevolute ammonoid conch model reflects significant ecological adaptations. The relatively streamlined shape likely provided advantages in fast-moving or turbulent waters, enabling the organism to thrive in various marine environments (Hebdon et al. 2020, Peterman and Ritterbush 2022, Ritterbush Kathleen A. 2016, Ritterbush Kathleen A. and Bottjer 2012, Ritterbush K. A. et al. 2014). The ribbed surface may also play a role in interaction with the surrounding environment, possibly aiding in camouflage or even facilitating interaction with other organisms.\n\nReferences:\nHebdon N, Ritterbush K, Choi Y. 2020. Computational fluid dynamics modeling of fossil ammonoid shells. Palaeontologia Electronica 23:a21.\nPeterman D, Ritterbush KA. 2022. Stability–Maneuverability Tradeoffs Provided Diverse Functional Opportunities to Shelled Cephalopods. Integrative Organismal Biology 4:obac048.\nRitterbush KA. 2016. Interpreting drag consequences of ammonoid shells by comparing studies in Westermann Morphospace. Swiss Journal of Palaeontology 135:125-138.\nRitterbush KA, Bottjer DJ. 2012. Westermann Morphospace displays ammonoid shell shape and hypothetical paleoecology. Paleobiology 38:424-446, 423.\nRitterbush KA, Hoffmann R, Lukeneder A, De Baets K. 2014. Pelagic palaeoecology: the importance of recent constraints on ammonoid palaeobiology and life history. Journal of Zoology 292:229-241.\n\n","imageAlt":null,"url":"https://www.cgtrader.com/3d-models/animal/other/subevolute-ammonoid-shell-with-spines","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/k8T39uLv8FkSphrtBZXzuctf/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/5.1.jpg","gridUrl":"https://media.cgtrader.com/variants/k8T39uLv8FkSphrtBZXzuctf/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/5.1.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/subevolute-ammonoid-shell-with-spines","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":12,"name":".obj","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5571481/f2ca417da9/subevolute-ammonoid-shell-with-spines-3d-model-f2ca417da9.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5806520","type":"listingItem","attributes":{"id":5806520,"title":"Ammonite - amonoids - three different - print","price":8.55,"description":"Ammonita model - a sub -party of extinct cephalopods (cephalopoda). Their shells occur in the rocks of maritime origin from the period from Dewon to the end of Cretaceous.\nThe model is best printed in the resin. It has no scale - print in the size you need. Two variants - with body and tentacles and with an empty shell and three diffrent shells\n","imageAlt":"nature Ammonite - amonoids - three different - print","url":"https://www.cgtrader.com/3d-print-models/miniatures/other/ammonite-amonoids-three-different-print","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/epv8bfthw71i1RmsSyhssFWP/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/1.jpg","gridUrl":"https://media.cgtrader.com/variants/epv8bfthw71i1RmsSyhssFWP/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/1.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-print-models/miniatures/other/ammonite-amonoids-three-different-print","isCgtVerified":false,"types":{"printReady":true,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":5,"name":".fbx","is_native":false},{"id":12,"name":".obj","is_native":false},{"id":51,"name":".stl","is_native":false}],"categorySlug":"miniatures","subcategorySlug":"other","categoryTitle":"Miniatures","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5806520/6f619fd0c7/ammonite-amonoids-three-different-print-3d-model-6f619fd0c7.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":true,"subscriptionPotential":false,"subscriptionTierBand":"essentials"}},{"id":"5597880","type":"listingItem","attributes":{"id":5597880,"title":"Ammonoid shell with monoschizotomous tripartite ribs ","price":15.0,"description":"This model emulates a sub-evolute ammonoid conch, displaying monoschizotomous (single subdivision) primary ribs that give rise to three secondary (tripartite) ribs.\nAmmonoids are a group of mollusks, more specifically cephalopods (which include octopuses, squids, cuttlefish, nautiloids, and others), that inhabited seas and oceans, first appearing in the Devonian period, around 419 million years ago. They went extinct alongside the dinosaurs during the mass extinction at the end of the Cretaceous period, approximately 66 million years ago. Ammonoids were a highly diverse and abundant group. At first glance, they resembled the modern Nautilus species, as they possessed an external shell that housed most of the animal's body. However, they are more closely related to coleoids, the group that includes octopuses, squids, and cuttlefish. Like the modern Nautilus, ammonoids had an external shell made of calcium carbonate (aragonite), subdivided into two components: the phragmocone and the living chamber. The phragmocone was divided internally by septa, which defined chambers connected by a ventral tube called the siphuncle. The living chamber contained most of the animal's body and was connected to the phragmocone via the siphuncle. The shell served not only as protection but also as the animal's primary buoyancy mechanism. The chambers contained air or another fluid of lower density than water, allowing the animal to regulate its position in the water column by controlling the amount of fluid in the chambers. This process is similar to how submarines fill or empty their ballast tanks to dive or surface. As the animal grew, the number of chambers increased, the size of the living chamber expanded, and consequently, the size of the shell also grew. Generally, ammonoids had shells that formed a flat spiral, but some species had uncoiled forms or deviated from this typical morphology, showing a wide variety of shapes and ornamentations. \n\n**By making a purchase, you are helping to fund future research on these fascinating creatures.\n If you're interested in exploring more fossil models, feel free to check out my profile for other options.**\n\n","imageAlt":"3D model Ammonoid shell with monoschizotomous tripartite","url":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-trichotomous-ribs","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/KR2d6tzTeoWSoFvZam5AfTuy/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0%20%284%29.jpg","gridUrl":"https://media.cgtrader.com/variants/KR2d6tzTeoWSoFvZam5AfTuy/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0%20%284%29.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-trichotomous-ribs","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":51,"name":".stl","is_native":false},{"id":12,"name":".obj","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5597880/4eb80ddc40/ammonoid-shell-with-monoschizotomous-tripartite-ribs-3d-model-4eb80ddc40.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5681385","type":"listingItem","attributes":{"id":5681385,"title":"Ammonoid shell subevolute and compressed Cantabricanites","price":15.0,"description":"Information: This model emulates the extremely involute ammonoid shell of Cantabricanites.  The genus Cantabricanites is characterized by a Conch large (to 20 cm phragmocone diameter), discoidal (W/D, 0.15-0.3), and widely evolute (U/D, 0.35-0.55) with compressed whorls and broadly rounded venter and umbilical shoulders. \n Ammonoids are a diverse group of extinct cephalopods bearing an external shell similar to Nautilus but closely related to modern coleoids, a group that includes cuttlefishes, octopuses, squids, among others (Hoffmann et al., 2022) . These organisms inhabited the ancient oceans from the Early Devonian to the earliest Palaeogene period, reaching an interval of approximately 350 million years across the Phanerozoic (Landman et al., 2015; Lehmann, 2015). Fossils of this external conch represent one of the most common findings in marine assemblages, showing a highly diverse and abundant record around the world (Saunders \u0026 Swan, 1984; Saunders et al., 2004; Korn \u0026 Klug, 2012; Morón-Alfonso et al., 2023, figs. 3-4).  Because the ammonoid conch grew along with the animal soft-body, this structure frequently records valuable information including morphological modifications that occurred during ontogeny useful to study the paleobiology and paleoecology of this group (Kullmann \u0026 Scheuch, 1970; Kant, 1973; Korn, 2012; Erlich et al., 2016). By making a purchase, you are helping to fund future research on these fascinating creatures. If you're interested in exploring more fossil models, feel free to check out my profile for other options.\n","imageAlt":"Ammonoid shell subevolute and compressed 3D model","url":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-subevolute-and-compressed-cantabricanites","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/EPqWgtuDbsyyQgbNEmwSUZLN/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0%20%284%29.jpg","gridUrl":"https://media.cgtrader.com/variants/EPqWgtuDbsyyQgbNEmwSUZLN/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0%20%284%29.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-subevolute-and-compressed-cantabricanites","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":189,"name":".ply","is_native":false},{"id":12,"name":".obj","is_native":false},{"id":51,"name":".stl","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5681385/d9be47e251/ammonoid-shell-subevolute-and-compressed-cantabricanites-3d-model-d9be47e251.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5631339","type":"listingItem","attributes":{"id":5631339,"title":"Ammonoid shell involute and compressed Metengonoceras","price":15.0,"description":"Information: This model emulates the extremely involute ammonoid shell of Metengoceras. An ammonoid of the Cretaceous. Single or branching irregular ribs and variably placed tubercles may occur. Sutures have numerous auxiliary and adventive elements of similar form, in general radially arranged (Klug et al., 2015). Ammonoids are a diverse group of extinct cephalopods bearing an external shell similar to Nautilus but closely related to modern coleoids, a group that includes cuttlefishes, octopuses, squids, among others (Hoffmann et al., 2022) . These organisms inhabited the ancient oceans from the Early Devonian to the earliest Palaeogene period, reaching an interval of approximately 350 million years across the Phanerozoic (Landman et al., 2015; Lehmann, 2015). Fossils of this external conch represent one of the most common findings in marine assemblages, showing a highly diverse and abundant record around the world (Saunders \u0026 Swan, 1984; Saunders et al., 2004; Korn \u0026 Klug, 2012; Morón-Alfonso et al., 2023, figs. 3-4).  Because the ammonoid conch grew along with the animal soft-body, this structure frequently records valuable information including morphological modifications that occurred during ontogeny useful to study the paleobiology and paleoecology of this group (Kullmann \u0026 Scheuch, 1970; Kant, 1973; Korn, 2012; Erlich et al., 2016). By making a purchase, you are helping to fund future research on these fascinating creatures. If you're interested in exploring more fossil models, feel free to check out my profile for other options.\nReferences:\nErlich, A., Moulton, D. E., Goriely, A., \u0026 Chirat, R., 2016, Morphomechanics and developmental constraints in the evolution of ammonites shell form: Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, v. 326, p. 437-450.\nHoffmann, R., Howarth, M., Fuchs, D., Klug, C., \u0026 Korn, D., 2022, The higher taxonomic nomenclature of Devonian to Cretaceous ammonoids and Jurassic to Cretaceous ammonites including their authorship and publication: Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, v. 305, p. 187-197.\nKant, R., 1973, Allometrisches Wachstum paläozoischer Ammonoideen: Variabilität und Korrelation einiger Merkmale: Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, v. 143, p. 153-192.\nKlug, C., Korn, D., Landman, N. H., Tanabe, K., De Baets, K., \u0026 Naglik, C., 2015, Describing Ammonoid Conchs, in Klug, C., Korn, D., De Baets, K., Kruta, I., \u0026 Mapes, R. H., eds., Ammonoid Paleobiology: From anatomy to ecology. Topics in Geobiology, vol 43, Volume Topics in Geobiology, vol 43: Dordrecht, Springer Netherlands, p. 3-24.\nKorn, D., 2012, Quantification of ontogenetic allometry in ammonoids, v. 14, p. 501-514.\nKorn, D., \u0026 Klug, C., 2012, Palaeozoic ammonoids – diversity and development of conch morphology, in Talent, J. A., ed., Earth and Life: Global Biodiversity, Extinction Intervals and Biogeographic Perturbations Through Time, Volume 1: Dordrecht, Springer Netherlands, p. 491-534.\nKullmann, J., \u0026 Scheuch, J., 1970, Wachstums-änderungen in der onto-genese paläozoischer ammonoideen: Lethaia, v. 3, no. 4, p. 397-412.\nLandman, N. H., Goolaerts, S., Jagt, J. W. M., Jagt-Yazykova, E. A., \u0026 Machalski, M., 2015, Ammonites on the Brink of Extinction: Diversity, Abundance, and Ecology of the Order Ammonoidea at the Cretaceous/Paleogene (K/Pg) Boundary, in Klug, C., Korn, D., De Baets, K., Kruta, I., \u0026 Mapes, R. H., eds., Ammonoid Paleobiology: From macroevolution to paleogeography: Dordrecht, Springer Netherlands, p. 497-553.\nLehmann, J., 2015, Ammonite Biostratigraphy of the Cretaceous—An Overview, in Klug, C., Korn, D., De Baets, K., Kruta, I., \u0026 Mapes, R. H., eds., Ammonoid Paleobiology: From macroevolution to paleogeography. Topics in Geobiology, vol 43: Dordrecht, Springer Netherlands, p. 403-429.\nMorón-Alfonso, D., Cichowolski, M., Hoffmann, R., Korn, D., Vennari, V., \u0026 Allaire, N., 2023, The intriguing shapes of the ammonoid whorl: Palaeontologia Electronica, v. 26, p. 1-23.\nSaunders, W. B., \u0026 Swan, A. R. H., 1984, Morphology and Morphologic Diversity of Mid-Carboniferous (Namurian) Ammonoids in Time and Space: Paleobiology, v. 10, p. 195-128.\nSaunders, W. B., Work, D. M., \u0026 Svetlana, V. N., 2004, The Evolutionary History of Shell Geometry in Paleozoic Ammonoids: Paleobiology, v. 30, p. 19-43.\n\n","imageAlt":"3D Ammonoid shell involute and compressed Metengonoceras","url":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-involute-and-compressed-metengonoceras","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/8ER7LQEhn1BvAbgTeGVJMHVG/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0%20%281%29.jpg","gridUrl":"https://media.cgtrader.com/variants/8ER7LQEhn1BvAbgTeGVJMHVG/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0%20%281%29.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-involute-and-compressed-metengonoceras","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":12,"name":".obj","is_native":false},{"id":51,"name":".stl","is_native":false},{"id":189,"name":".ply","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5631339/9461635307/ammonoid-shell-involute-and-compressed-metengonoceras-3d-model-9461635307.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5605207","type":"listingItem","attributes":{"id":5605207,"title":"Ammonoid shell with plicate strong ribs","price":15.0,"description":"This model emulates a subevolute ammonoid conch, showing concave plicate ribs characterized by a being relatively strong with a subtriangular profile  \nAmmonoids are a group of mollusks, more specifically cephalopods (which include octopuses, squids, cuttlefish, nautiloids, and others), that inhabited seas and oceans, first appearing in the Devonian period, around 419 million years ago. They went extinct alongside the dinosaurs during the mass extinction at the end of the Cretaceous period, approximately 66 million years ago. Ammonoids were a highly diverse and abundant group. At first glance, they resembled the modern Nautilus species, as they possessed an external shell that housed most of the animal's body. However, they are more closely related to coleoids, the group that includes octopuses, squids, and cuttlefish. Like the modern Nautilus, ammonoids had an external shell made of calcium carbonate (aragonite), subdivided into two components: the phragmocone and the living chamber. The phragmocone was divided internally by septa, which defined chambers connected by a ventral tube called the siphuncle. The living chamber contained most of the animal's body and was connected to the phragmocone via the siphuncle. The shell served not only as protection but also as the animal's primary buoyancy mechanism. The chambers contained air or another fluid of lower density than water, allowing the animal to regulate its position in the water column by controlling the amount of fluid in the chambers. This process is similar to how submarines fill or empty their ballast tanks to dive or surface. As the animal grew, the number of chambers increased, the size of the living chamber expanded, and consequently, the size of the shell also grew. Generally, ammonoids had shells that formed a flat spiral, but some species had uncoiled forms or deviated from this typical morphology, showing a wide variety of shapes and ornamentations. \n**By making a purchase, you are helping to fund future research on these fascinating creatures.\n If you're interested in exploring more fossil models, feel free to check out my profile for other options.**\n","imageAlt":"3D Ammonoid shell with plicate strong ribs","url":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-plicate-strong-ribs","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/xjPJX4ewAGubNxmDFdSKPA5f/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0%20%284%29.jpg","gridUrl":"https://media.cgtrader.com/variants/xjPJX4ewAGubNxmDFdSKPA5f/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0%20%284%29.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-plicate-strong-ribs","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":51,"name":".stl","is_native":false},{"id":12,"name":".obj","is_native":false},{"id":189,"name":".ply","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5605207/1ff6ac9052/ammonoid-shell-with-plicate-strong-ribs-3d-model-1ff6ac9052.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5594456","type":"listingItem","attributes":{"id":5594456,"title":"Ammonoid shell with intercalary ribs","price":15.0,"description":"This model emulates a subevolute ammonoid conch, showing two types of ribs. The first type of ribs is the most developed showing a node in the umbilical region. The second type consist of incomplete intercalary ribs that don’t reach the umbilicus.\nAmmonoids are a group of mollusks, more specifically cephalopods (which include octopuses, squids, cuttlefish, nautiloids, and others), that inhabited seas and oceans, first appearing in the Devonian period, around 419 million years ago. They went extinct alongside the dinosaurs during the mass extinction at the end of the Cretaceous period, approximately 66 million years ago. Ammonoids were a highly diverse and abundant group. At first glance, they resembled the modern Nautilus species, as they possessed an external shell that housed most of the animal's body. However, they are more closely related to coleoids, the group that includes octopuses, squids, and cuttlefish. Like the modern Nautilus, ammonoids had an external shell made of calcium carbonate (aragonite), subdivided into two components: the phragmocone and the living chamber. The phragmocone was divided internally by septa, which defined chambers connected by a ventral tube called the siphuncle. The living chamber contained most of the animal's body and was connected to the phragmocone via the siphuncle. The shell served not only as protection but also as the animal's primary buoyancy mechanism. The chambers contained air or another fluid of lower density than water, allowing the animal to regulate its position in the water column by controlling the amount of fluid in the chambers. This process is similar to how submarines fill or empty their ballast tanks to dive or surface. As the animal grew, the number of chambers increased, the size of the living chamber expanded, and consequently, the size of the shell also grew. Generally, ammonoids had shells that formed a flat spiral, but some species had uncoiled forms or deviated from this typical morphology, showing a wide variety of shapes and ornamentations. \n**By making a purchase, you are helping to fund future research on these fascinating creatures.\n If you're interested in exploring more fossil models, feel free to check out my profile for other options.**\n","imageAlt":"3d 3D Ammonoid shell with intercalary ribs","url":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-intercalary-ribs","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/pHSx87PFZfay4i4WCAKBHzDG/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/1%20%284%29.jpg","gridUrl":"https://media.cgtrader.com/variants/pHSx87PFZfay4i4WCAKBHzDG/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/1%20%284%29.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-intercalary-ribs","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":12,"name":".obj","is_native":false},{"id":51,"name":".stl","is_native":false},{"id":189,"name":".ply","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5594456/3fa5d91f4e/ammonoid-shell-with-intercalary-ribs-3d-model-3fa5d91f4e.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5580341","type":"listingItem","attributes":{"id":5580341,"title":"Ammonoid shell with monoschizotomous bipartite ribs","price":15.0,"description":"This model emulates a subevolute ammonoid conch, characterized by strong, straight lateral ribs that branching once and originating two secondary ribs.\nAmmonoids are a group of mollusks, more specifically cephalopods (which include octopuses, squids, cuttlefish, nautiloids, and others), that inhabited seas and oceans, first appearing in the Devonian period, around 419 million years ago. They went extinct alongside the dinosaurs during the mass extinction at the end of the Cretaceous period, approximately 66 million years ago. Ammonoids were a highly diverse and abundant group. At first glance, they resembled the modern Nautilus species, as they possessed an external shell that housed most of the animal's body. However, they are more closely related to coleoids, the group that includes octopuses, squids, and cuttlefish. Like the modern Nautilus, ammonoids had an external shell made of calcium carbonate (aragonite), subdivided into two components: the phragmocone and the living chamber. The phragmocone was divided internally by septa, which defined chambers connected by a ventral tube called the siphuncle. The living chamber contained most of the animal's body and was connected to the phragmocone via the siphuncle. The shell served not only as protection but also as the animal's primary buoyancy mechanism. The chambers contained air or another fluid of lower density than water, allowing the animal to regulate its position in the water column by controlling the amount of fluid in the chambers. This process is similar to how submarines fill or empty their ballast tanks to dive or surface. As the animal grew, the number of chambers increased, the size of the living chamber expanded, and consequently, the size of the shell also grew. Generally, ammonoids had shells that formed a flat spiral, but some species had uncoiled forms or deviated from this typical morphology, showing a wide variety of shapes and ornamentations. \n**By making a purchase, you are helping to fund future research on these fascinating creatures.\n If you're interested in exploring more fossil models, feel free to check out my profile for other options.**\n\n\n","imageAlt":"Ammonoid shell with monoschizotomous bipartite ribs 3D","url":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-monoschizotomous-bipartite-ribs","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/9xjvMH4mZSaSfNESKoSSzpA6/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/1.jpg","gridUrl":"https://media.cgtrader.com/variants/9xjvMH4mZSaSfNESKoSSzpA6/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/1.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-monoschizotomous-bipartite-ribs","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":12,"name":".obj","is_native":false},{"id":51,"name":".stl","is_native":false},{"id":189,"name":".ply","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5580341/a5283c4e7b/ammonoid-shell-with-monoschizotomous-bipartite-ribs-3d-model-a5283c4e7b.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5601326","type":"listingItem","attributes":{"id":5601326,"title":"Ammonoid shell with virgatotome ribs","price":15.0,"description":"Information: This model emulates a subevolute ammonoid conch, showing virgatotome ribs Having multiple secondary ribs which branch off successively in front of each primary rib.\n\nAmmonoids are a group of mollusks, more specifically cephalopods (which include octopuses, squids, cuttlefish, nautiloids, and others), that inhabited seas and oceans, first appearing in the Devonian period, around 419 million years ago. They went extinct alongside the dinosaurs during the mass extinction at the end of the Cretaceous period, approximately 66 million years ago. Ammonoids were a\nhighly diverse and abundant group. At first glance, they resembled the modern Nautilus species, as they possessed an external shell that housed most of the animal's body. However, they are more closely related to coleoids, the group that includes octopuses, squids, and cuttlefish. Like the modern Nautilus, ammonoids had an external shell made of calcium carbonate (aragonite), subdivided into two components: the phragmocone and the living chamber. The phragmocone was divided internally by septa, which defined chambers connected by a ventral tube\ncalled the siphuncle. The living chamber contained most of the animal's body and was connected to the phragmocone via the siphuncle. The shell served not only as protection but also as the animal's primary buoyancy mechanism. The chambers contained air or another fluid of lower density than water, allowing the animal to regulate its position in the water column by controlling the amount of fluid in the chambers. This process is similar to how submarines fill or empty their ballast tanks to dive or surface. As the animal grew, the number of chambers increased, the size of the living chamber expanded, and consequently, the size of the shell also grew. Generally, ammonoids had shells  that formed a flat spiral, but some species had uncoiled forms or deviated from this typical morphology, showing a wide variety of shapes and ornamentations. \n\n**By  making a purchase, you are helping to fund future research on these fascinatin creatures. If you're interested in exploring more fossil models, feel free to check out my profile for other options.**\n\n\n","imageAlt":"3D model Ammonoid shell with virgatotome ribs","url":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-virgatotome-ribs","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/Z9bf3bSpgJeWxBvGwtQ4JaJ3/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0%20%284%29.jpg","gridUrl":"https://media.cgtrader.com/variants/Z9bf3bSpgJeWxBvGwtQ4JaJ3/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0%20%284%29.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-virgatotome-ribs","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":12,"name":".obj","is_native":false},{"id":51,"name":".stl","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5601326/7129d3935c/ammonoid-shell-with-virgatotome-ribs-3d-model-7129d3935c.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5591372","type":"listingItem","attributes":{"id":5591372,"title":"Ammonoid shell with falcoid ribs","price":15.0,"description":"Information: This model emulates a subevolute ammonoid conch, showing relatively moderately thin falcate ribs (Klug et al., 2015). Ammonoids are a diverse group of extinct cephalopods bearing an external shell similar to Nautilus but closely related to modern coleoids, a group that includes cuttlefishes, octopuses, squids, among others (Hoffmann et al., 2022) . These organisms inhabited the ancient oceans from the Early Devonian to the earliest Palaeogene period, reaching an interval of approximately 350 million years across the Phanerozoic (Landman et al., 2014; Landman et al., 2015; Lehmann, 2015). Fossils of this external conch represent one of the most common findings in marine assemblages, showing a highly diverse and abundant record around the world (Saunders \u0026 Swan, 1984; Dommergues et al., 1996; Saunders et al., 2004; Korn \u0026 Klug, 2012; Monnet et al., 2015; Morón-Alfonso et al., 2023, figs. 3-4).  Because the ammonoid conch grew along with the animal soft-body, this structure frequently records valuable information including morphological modifications that occurred during ontogeny useful to study the paleobiology and paleoecology of this group (Kullmann \u0026 Scheuch, 1970; Kant, 1973; Korn, 2012; Korn \u0026 Klug, 2012; Erlich et al., 2016). By making a purchase, you are helping to fund future research on these fascinating creatures. If you're interested in exploring more fossil models, feel free to check out my profile for other options.\nReferences:\nDommergues, J.-L., Laurin, B., \u0026 Meister, C., 1996, Evolution of Ammonoid Morphospace During the Early Jurassic Radiation: Paleobiology, v. 22, no. 2, p. 219-240.\nErlich, A., Moulton, D. E., Goriely, A., \u0026 Chirat, R., 2016, Morphomechanics and developmental constraints in the evolution of ammonites shell form: Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, v. 326, p. 437-450.\nHoffmann, R., Howarth, M., Fuchs, D., Klug, C., \u0026 Korn, D., 2022, The higher taxonomic nomenclature of Devonian to Cretaceous ammonoids and Jurassic to Cretaceous ammonites including their authorship and publication: Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, v. 305, p. 187-197.\nKant, R., 1973, Allometrisches Wachstum paläozoischer Ammonoideen: Variabilität und Korrelation einiger Merkmale: Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, v. 143, p. 153-192.\nKlug, C., Korn, D., Landman, N. H., Tanabe, K., De Baets, K., \u0026 Naglik, C., 2015, Describing Ammonoid Conchs, in Klug, C., Korn, D., De Baets, K., Kruta, I., \u0026 Mapes, R. H., eds., Ammonoid Paleobiology: From anatomy to ecology. Topics in Geobiology, vol 43, Volume Topics in Geobiology, vol This model emulates a subevolute ammonoid conch, showing relatively moderately thin falcate ribs. \nAmmonoids are a group of mollusks, more specifically cephalopods (which include octopuses, squids, cuttlefish, nautiloids, and others), that inhabited seas and oceans, first appearing in the Devonian period, around 419 million years ago. They went extinct alongside the dinosaurs during the mass extinction at the end of the Cretaceous period, approximately 66 million years ago. Ammonoids were a highly diverse and abundant group. At first glance, they resembled the modern Nautilus species, as they possessed an external shell that housed most of the animal's body. However, they are more closely related to coleoids, the group that includes octopuses, squids, and cuttlefish. Like the modern Nautilus, ammonoids had an external shell made of calcium carbonate (aragonite), subdivided into two components: the phragmocone and the living chamber. The phragmocone was divided internally by septa, which defined chambers connected by a ventral tube called the siphuncle. The living chamber contained most of the animal's body and was connected to the phragmocone via the siphuncle. The shell served not only as protection but also as the animal's primary buoyancy mechanism. The chambers contained air or another fluid of lower density than water, allowing the animal to regulate its position in the water column by controlling the amount of fluid in the chambers. This process is similar to how submarines fill or empty their ballast tanks to dive or surface. As the animal grew, the number of chambers increased, the size of the living chamber expanded, and consequently, the size of the shell also grew. Generally, ammonoids had shells that formed a flat spiral, but some species had uncoiled forms or deviated from this typical morphology, showing a wide variety of shapes and ornamentations. \nBy making a purchase, you are helping to fund future research on these fascinating creatures.\n If you're interested in exploring more fossil models, feel free to check out my profile for other options.\n","imageAlt":"3D Ammonoid shell with falcoid ribs","url":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-falcate-ribs","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/3KydcM3QL8L8jrsGCntWK8yc/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0004.jpg","gridUrl":"https://media.cgtrader.com/variants/3KydcM3QL8L8jrsGCntWK8yc/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0004.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-falcate-ribs","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":51,"name":".stl","is_native":false},{"id":12,"name":".obj","is_native":false},{"id":189,"name":".ply","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5591372/99e8e66e93/ammonoid-shell-with-falcoid-ribs-3d-model-99e8e66e93.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5608906","type":"listingItem","attributes":{"id":5608906,"title":"Ammonoid shell with ventral nodes and convex ribs","price":15.0,"description":"Description:\nThis model emulates a subevolute ammonoid conch, showing elongated ventral nodes and convex ribs\nAmmonoids are a group of mollusks, more specifically cephalopods (which include octopuses, squids, cuttlefish, nautiloids, and others), that inhabited seas and oceans, first appearing in the Devonian period, around 419 million years ago. They went extinct alongside the dinosaurs during the mass extinction at the end of the Cretaceous period, approximately 66 million years ago. Ammonoids were a highly diverse and abundant group. At first glance, they resembled the modern Nautilus species, as they possessed an external shell that housed most of the animal's body. However, they are more closely related to coleoids, the group that includes octopuses, squids, and cuttlefish. Like the modern Nautilus, ammonoids had an external shell made of calcium carbonate (aragonite), subdivided into two components: the phragmocone and the living chamber. The phragmocone was divided internally by septa, which defined chambers connected by a ventral tube called the siphuncle. The living chamber contained most of the animal's body and was connected to the phragmocone via the siphuncle. The shell served not only as protection but also as the animal's primary buoyancy mechanism. The chambers contained air or another fluid of lower density than water, allowing the animal to regulate its position in the water column by controlling the amount of fluid in the chambers. This process is similar to how submarines fill or empty their ballast tanks to dive or surface. As the animal grew, the number of chambers increased, the size of the living chamber expanded, and consequently, the size of the shell also grew. Generally, ammonoids had shells that formed a flat spiral, but some species had uncoiled forms or deviated from this typical morphology, showing a wide variety of shapes and ornamentations.\n\n** By making a purchase, you are helping to fund future research on these fascinating creatures.\n If you're interested in exploring more fossil models, feel free to check out my profile for other options.\n**","imageAlt":"3D Ammonoid shell with ventral nodes and convex ribs","url":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-ventral-nodes-and-convex-ribs","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/4Tq3c4cHdyNspVXU6uKpqss3/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0%20%284%29.jpg","gridUrl":"https://media.cgtrader.com/variants/4Tq3c4cHdyNspVXU6uKpqss3/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0%20%284%29.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-ventral-nodes-and-convex-ribs","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":189,"name":".ply","is_native":false},{"id":12,"name":".obj","is_native":false},{"id":51,"name":".stl","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5608906/2bf76180ea/ammonoid-shell-with-ventral-nodes-and-convex-ribs-3d-model-2bf76180ea.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5608265","type":"listingItem","attributes":{"id":5608265,"title":"Ammonoid shell with nodes","price":15.0,"description":"This model emulates the shell of a subevolute ammonoid conch, showing strong ribs with nodes around the whorl. \nAmmonoids are a group of mollusks, more specifically cephalopods (which include octopuses, squids, cuttlefish, nautiloids, and others), that inhabited seas and oceans, first appearing in the Devonian period, around 419 million years ago. They went extinct alongside the dinosaurs during the mass extinction at the end of the Cretaceous period, approximately 66 million years ago. Ammonoids were a highly diverse and abundant group. At first glance, they resembled the modern Nautilus species, as they possessed an external shell that housed most of the animal's body. However, they are more closely related to coleoids, the group that includes octopuses, squids, and cuttlefish. Like the modern Nautilus, ammonoids had an external shell made of calcium carbonate (aragonite), subdivided into two components: the phragmocone and the living chamber. The phragmocone was divided internally by septa, which defined chambers connected by a ventral tube called the siphuncle. The living chamber contained most of the animal's body and was connected to the phragmocone via the siphuncle. The shell served not only as protection but also as the animal's primary buoyancy mechanism. The chambers contained air or another fluid of lower density than water, allowing the animal to regulate its position in the water column by controlling the amount of fluid in the chambers. This process is similar to how submarines fill or empty their ballast tanks to dive or surface. As the animal grew, the number of chambers increased, the size of the living chamber expanded, and consequently, the size of the shell also grew. Generally, ammonoids had shells that formed a flat spiral, but some species had uncoiled forms or deviated from this typical morphology, showing a wide variety of shapes and ornamentations. \n**By making a purchase, you are helping to fund future research on these fascinating creatures.\n If you're interested in exploring more fossil models, feel free to check out my profile for other options.\n**","imageAlt":"Ammonoid shell with nodes 3D model","url":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-nodes","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/NZZgUoEzC4vGwdoNAPwuomSX/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/1%20%284%29.jpg","gridUrl":"https://media.cgtrader.com/variants/NZZgUoEzC4vGwdoNAPwuomSX/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/1%20%284%29.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-nodes","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":12,"name":".obj","is_native":false},{"id":189,"name":".ply","is_native":false},{"id":51,"name":".stl","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5608265/762d358d0f/ammonoid-shell-with-nodes-3d-model-762d358d0f.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"7073820","type":"listingItem","attributes":{"id":7073820,"title":"Ammonoid shell with Anagaudryceras  type Ornamentation ","price":15.0,"description":"**Description**:\n\nThis model emulates an ammonoid shell with _Anagaudryceras _type ornamentation, that it is characterize by wide and slightly sinuous ribs with very soft umbilical region.\nAmmonoids are a group of mollusks, more specifically cephalopods (which include octopuses, squids, cuttlefish, nautiloids, and others), that inhabited seas and oceans, first appearing in the Devonian period, around 419 million years ago. They went extinct alongside the dinosaurs during the mass extinction at the end of the Cretaceous period, approximately 66 million years ago. Ammonoids were a highly diverse and abundant group. At first glance, they resembled the modern Nautilus species, as they possessed an external shell that housed most of the animal's body. However, they are more closely related to coleoids, the group that includes octopuses, squids, and cuttlefish. Like the modern Nautilus, ammonoids had an external shell made of calcium carbonate (aragonite), subdivided into two components: the phragmocone and the living chamber. The phragmocone was divided internally by septa, which defined chambers connected by a ventral tube called the siphuncle. The living chamber contained most of the animal's body and was connected to the phragmocone via the siphuncle. The shell served not only as protection but also as the animal's primary buoyancy mechanism. The chambers contained air or another fluid of lower density than water, allowing the animal to regulate its position in the water column by controlling the amount of fluid in the chambers. This process is similar to how submarines fill or empty their ballast tanks to dive or surface. As the animal grew, the number of chambers increased, the size of the living chamber expanded, and consequently, the size of the shell also grew. Generally, ammonoids had shells that formed a flat spiral, but some species had uncoiled forms or deviated from this typical morphology, showing a wide variety of shapes and ornamentations. By making a purchase, you are helping to fund future research on these fascinating creatures.\n \n**If you're interested in exploring more fossil models, feel free to check out my profile for other options.\n**","imageAlt":"3D model Ammonoid shell with Anagaudryceras type","url":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-anagaudryceras-type-ornamentation","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/284cwjgmmdx447bsoaawjnvb9ur1/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0001.jpg","gridUrl":"https://media.cgtrader.com/variants/284cwjgmmdx447bsoaawjnvb9ur1/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0001.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-anagaudryceras-type-ornamentation","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":51,"name":".stl","is_native":false},{"id":5,"name":".fbx","is_native":false},{"id":12,"name":".obj","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/7073820/80414bc2e2/ammonoid-shell-with-anagaudryceras-type-ornamentation-3d-model-80414bc2e2.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5700676","type":"listingItem","attributes":{"id":5700676,"title":"Ammonoid shell Paraspiticeras","price":15.0,"description":"This model emulates the pachyconic ammonoid shell of Paraspiticeras. Diagnosis–Initial whorl open, then evolute, with round or depressed rapidly enlarging whorls. Suture quadrilobate throughout.\nAmmonoids are a diverse group of extinct cephalopods bearing an external shell similar to Nautilus but closely related to modern coleoids, a group that includes cuttlefishes, octopuses, squids, among others (Hoffmann et al., 2022) . These organisms inhabited the ancient oceans from the Early Devonian to the earliest Palaeogene period, reaching an interval of approximately 350 million years across the Phanerozoic (Landman et al., 2015; Lehmann, 2015). Fossils of this external conch represent one of the most common findings in marine assemblages, showing a highly diverse and abundant record around the world (Saunders \u0026 Swan, 1984; Saunders et al., 2004; Korn \u0026 Klug, 2012; Morón-Alfonso et al., 2023, figs. 3-4).  Because the ammonoid conch grew along with the animal soft-body, this structure frequently records valuable information including morphological modifications that occurred during ontogeny useful to study the paleobiology and paleoecology of this group (Kullmann \u0026 Scheuch, 1970; Kant, 1973; Korn, 2012; Erlich et al., 2016). By making a purchase, you are helping to fund future research on these fascinating creatures. If you're interested in exploring more fossil models, feel free to check out my profile for other options.\n","imageAlt":"3D Ammonoid shell Paraspiticeras","url":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-paraspiticeras","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/FYJQAShC29GBpzQBShJHYn4k/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0004.jpg","gridUrl":"https://media.cgtrader.com/variants/FYJQAShC29GBpzQBShJHYn4k/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0004.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-paraspiticeras","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":12,"name":".obj","is_native":false},{"id":189,"name":".ply","is_native":false},{"id":51,"name":".stl","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5700676/fb76a2d90f/ammonoid-shell-paraspiticeras-3d-model-fb76a2d90f.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5616629","type":"listingItem","attributes":{"id":5616629,"title":"Ammonoid shell with umbilical ribs and constriction","price":15.0,"description":"This model emulates a subevolute ammonoid conch, showing umbilical ribs with constrictions in the last whorls.\nAmmonoids are a group of mollusks, more specifically cephalopods (which include octopuses, squids, cuttlefish, nautiloids, and others), that inhabited seas and oceans, first appearing in the Devonian period, around 419 million years ago. They went extinct alongside the dinosaurs during the mass extinction at the end of the Cretaceous period, approximately 66 million years ago. Ammonoids were a highly diverse and abundant group. At first glance, they resembled the modern Nautilus species, as they possessed an external shell that housed most of the animal's body. However, they are more closely related to coleoids, the group that includes octopuses, squids, and cuttlefish. Like the modern Nautilus, ammonoids had an external shell made of calcium carbonate (aragonite), subdivided into two components: the phragmocone and the living chamber. The phragmocone was divided internally by septa, which defined chambers connected by a ventral tube called the siphuncle. The living chamber contained most of the animal's body and was connected to the phragmocone via the siphuncle. The shell served not only as protection but also as the animal's primary buoyancy mechanism. The chambers contained air or another fluid of lower density than water, allowing the animal to regulate its position in the water column by controlling the amount of fluid in the chambers. This process is similar to how submarines fill or empty their ballast tanks to dive or surface. As the animal grew, the number of chambers increased, the size of the living chamber expanded, and consequently, the size of the shell also grew. Generally, ammonoids had shells that formed a flat spiral, but some species had uncoiled forms or deviated from this typical morphology, showing a wide variety of shapes and ornamentations. \n**By making a purchase, you are helping to fund future research on these fascinating creatures.\n If you're interested in exploring more fossil models, feel free to check out my profile for other options.**\n","imageAlt":"3D model Ammonoid shell with umbilical ribs and","url":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-umbilical-ribs-and-constriction","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/ihEYRefZk8pqvCVxNRDrVYcj/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0%20%281%29.jpg","gridUrl":"https://media.cgtrader.com/variants/ihEYRefZk8pqvCVxNRDrVYcj/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0%20%281%29.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-umbilical-ribs-and-constriction","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":51,"name":".stl","is_native":false},{"id":12,"name":".obj","is_native":false},{"id":189,"name":".ply","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5616629/b6a56fc4a4/ammonoid-shell-with-umbilical-ribs-and-constriction-3d-model-b6a56fc4a4.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5584380","type":"listingItem","attributes":{"id":5584380,"title":"Ammonoid shell with sinuous ribs","price":15.0,"description":"Information: This model emulates a subevolute ammonoid conch, displaying a sinuous ribbing pattern. In subevolute ammonoids, the whorls are loosely coiled, leading to a shell design where the umbilicus— the central depression of the shell where the whorls meet—is relatively exposed. This results in a more large and somewhat compressed overall shell form, enhancing the conch's streamlined profile. The design of this subevolute ammonoid conch model reflects significant ecological adaptations. The relatively streamlined shape likely provided advantages in fast-moving or turbulent waters, enabling the organism to thrive in various marine environments (Hebdon et al. 2020, Peterman and Ritterbush 2022, Ritterbush Kathleen A. 2016, Ritterbush Kathleen A. and Bottjer 2012, Ritterbush K. A. et al. 2014). The ribbed surface may also play a role in interaction with the surrounding environment, possibly aiding in camouflage or even facilitating interaction with other organisms.\nReferences:\nHebdon N, Ritterbush K, Choi Y. 2020. Computational fluid dynamics modeling of fossil ammonoid shells. Palaeontologia Electronica 23:a21.\nPeterman D, Ritterbush KA. 2022. Stability–Maneuverability Tradeoffs Provided Diverse Functional Opportunities to Shelled Cephalopods. Integrative Organismal Biology 4:obac048.\nRitterbush KA. 2016. Interpreting drag consequences of ammonoid shells by comparing studies in Westermann Morphospace. Swiss Journal of Palaeontology 135:125-138.\nRitterbush KA, Bottjer DJ. 2012. Westermann Morphospace displays ammonoid shell shape and hypothetical paleoecology. Paleobiology 38:424-446, 423.\nRitterbush KA, Hoffmann R, Lukeneder A, De Baets K. 2014. Pelagic palaeoecology: the importance of recent constraints on ammonoid palaeobiology and life history. Journal of Zoology 292:229-241.\n","imageAlt":"Ammonoid shell with sinuous ribs mollusca 3D","url":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-sinuous-ribs","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/8qGzqKKGi2TsGSUJLZ8jjghW/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/1.jpg","gridUrl":"https://media.cgtrader.com/variants/8qGzqKKGi2TsGSUJLZ8jjghW/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/1.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-sinuous-ribs","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":12,"name":".obj","is_native":false},{"id":51,"name":".stl","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5584380/6e05c2d530/ammonoid-shell-with-sinuous-ribs-3d-model-6e05c2d530.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"7027953","type":"listingItem","attributes":{"id":7027953,"title":"Ammonoid shell with Gaudryceras  -type Ornamentation","price":15.0,"description":"Description:\nThis model emulates an ammonoid shell with _Gaudryceras _type ornamentation, that it is characterize by sinuous ribs with very broad and wide umbilical and dorsoventral regions that show several subdivisions towards the ventral region. \n\nAmmonoids are a group of mollusks, more specifically cephalopods (which include octopuses, squids, cuttlefish, nautiloids, and others), that inhabited seas and oceans, first appearing in the Devonian period, around 419 million years ago. They went extinct alongside the dinosaurs during the mass extinction at the end of the Cretaceous period, approximately 66 million years ago. Ammonoids were a highly diverse and abundant group. At first glance, they resembled the modern Nautilus species, as they possessed an external shell that housed most of the animal's body. However, they are more closely related to coleoids, the group that includes octopuses, squids, and cuttlefish. Like the modern Nautilus, ammonoids had an external shell made of calcium carbonate (aragonite), subdivided into two components: the phragmocone and the living chamber. The phragmocone was divided internally by septa, which defined chambers connected by a ventral tube called the siphuncle. The living chamber contained most of the animal's body and was connected to the phragmocone via the siphuncle. The shell served not only as protection but also as the animal's primary buoyancy mechanism. The chambers contained air or another fluid of lower density than water, allowing the animal to regulate its position in the water column by controlling the amount of fluid in the chambers. This process is similar to how submarines fill or empty their ballast tanks to dive or surface. As the animal grew, the number of chambers increased, the size of the living chamber expanded, and consequently, the size of the shell also grew. Generally, ammonoids had shells that formed a flat spiral, but some species had uncoiled forms or deviated from this typical morphology, showing a wide variety of shapes and ornamentations. By making a purchase, you are helping to fund future research on these fascinating creatures.\n If you're interested in exploring more fossil models, feel free to check out my profile for other options.\n","imageAlt":"Ammonoid shell with Gaudryceras -type Ornamentation 3D","url":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-gaudryceras-type-ornamentation","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/8xkm3wpm4jkj5w0dmmzio7v5h572/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0004.jpg","gridUrl":"https://media.cgtrader.com/variants/8xkm3wpm4jkj5w0dmmzio7v5h572/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0004.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-gaudryceras-type-ornamentation","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":12,"name":".obj","is_native":false},{"id":51,"name":".stl","is_native":false},{"id":5,"name":".fbx","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/7027953/5096b3030a/ammonoid-shell-with-gaudryceras-type-ornamentation-3d-model-5096b3030a.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5008775","type":"listingItem","attributes":{"id":5008775,"title":"Crioceratites Ammonoid Shell","price":15.0,"description":"Topology properties:\n\nTriangles: 1505536\nVertices: 752770\n\n_Crioceratites _is an ammonite genus from the Early Cretaceous belonging to the Ancyloceratoidea.\n_Crioceratites _was formerly included in the Ancyloceratidae, in the subfamily Crioceratinae which was subsequently elevated in rank to the family Crioceratidae. Crioceras and Toxoceras d'Orbigny and possibly Emericiceras Sarka 1954 are junior synonyms.\n_Crioceratites _is coiled in an open, normally equiangular spiral with an oval or subquadrate whorl section. The surface is banded by fine, dense, rounded ribbing sectioned by periodically spaced thick and often spinose ribs.\n","imageAlt":"3D print model Cioceratites Ammonoid Shell","url":"https://www.cgtrader.com/3d-print-models/science/biology/cioceratites-ammonoid-shell","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/cAcHvh6JD2WW53Bz5uQTk2tw/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0000.jpg","gridUrl":"https://media.cgtrader.com/variants/cAcHvh6JD2WW53Bz5uQTk2tw/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0000.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-print-models/science/biology/cioceratites-ammonoid-shell","isCgtVerified":false,"types":{"printReady":true,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":51,"name":".stl","is_native":false},{"id":12,"name":".obj","is_native":false}],"categorySlug":"science","subcategorySlug":"biology","categoryTitle":"Science","subcategoryTitle":"Biology","schemaImageUrl":"https://img-new.cgtrader.com/items/5008775/070350a5b6/crioceratites-ammonoid-shell-3d-model-070350a5b6.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5567603","type":"listingItem","attributes":{"id":5567603,"title":"Ammonoid shell model simple rectiradiate and strong ribs","price":15.0,"description":"This model emulates the shell of a subevolute ammonoid with simple rectiradiate and strong ribs.\nAmmonoids are a group of mollusks, more specifically cephalopods (which include octopuses, squids, cuttlefish, nautiloids, and others), that inhabited seas and oceans, first appearing in the Devonian period, around 419 million years ago. They went extinct alongside the dinosaurs during the mass extinction at the end of the Cretaceous period, approximately 66 million years ago. Ammonoids were a highly diverse and abundant group. At first glance, they resembled the modern Nautilus species, as they possessed an external shell that housed most of the animal's body. However, they are more closely related to coleoids, the group that includes octopuses, squids, and cuttlefish. Like the modern Nautilus, ammonoids had an external shell made of calcium carbonate (aragonite), subdivided into two components: the phragmocone and the living chamber. The phragmocone was divided internally by septa, which defined chambers connected by a ventral tube called the siphuncle. The living chamber contained most of the animal's body and was connected to the phragmocone via the siphuncle. The shell served not only as protection but also as the animal's primary buoyancy mechanism. The chambers contained air or another fluid of lower density than water, allowing the animal to regulate its position in the water column by controlling the amount of fluid in the chambers. This process is similar to how submarines fill or empty their ballast tanks to dive or surface. As the animal grew, the number of chambers increased, the size of the living chamber expanded, and consequently, the size of the shell also grew. Generally, ammonoids had shells that formed a flat spiral, but some species had uncoiled forms or deviated from this typical morphology, showing a wide variety of shapes and ornamentations. \n\n**By making a purchase, you are helping to fund future research on these fascinating creatures.\n If you're interested in exploring more fossil models, feel free to check out my profile for other options.**\n","imageAlt":"3D Ammonoid shell model simple rectiradiate and strong 1","url":"https://www.cgtrader.com/3d-models/animal/other/sub-evolute-ribbed-ammonoid-shell","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/9sfvuTAWBdyPcYnvcaZ5hBdM/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0005.jpg","gridUrl":"https://media.cgtrader.com/variants/9sfvuTAWBdyPcYnvcaZ5hBdM/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0005.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/sub-evolute-ribbed-ammonoid-shell","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":189,"name":".ply","is_native":false},{"id":12,"name":".obj","is_native":false},{"id":51,"name":".stl","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5567603/8a70fbad9a/ammonoid-shell-model-simple-rectiradiate-and-strong-ribs-3d-model-8a70fbad9a.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5576999","type":"listingItem","attributes":{"id":5576999,"title":"Sub evolute Ammonoid shell With Ventral Furrow","price":15.0,"description":"This model emulates a subevolute ammonoid conch, characterized by strong, straight lateral ribs and a ventral furrow.\nAmmonoids are a group of mollusks, more specifically cephalopods (which include octopuses, squids, cuttlefish, nautiloids, and others), that inhabited seas and oceans, first appearing in the Devonian period, around 419 million years ago. They went extinct alongside the dinosaurs during the mass extinction at the end of the Cretaceous period, approximately 66 million years ago. Ammonoids were a highly diverse and abundant group. At first glance, they resembled the modern Nautilus species, as they possessed an external shell that housed most of the animal's body. However, they are more closely related to coleoids, the group that includes octopuses, squids, and cuttlefish. Like the modern Nautilus, ammonoids had an external shell made of calcium carbonate (aragonite), subdivided into two components: the phragmocone and the living chamber. The phragmocone was divided internally by septa, which defined chambers connected by a ventral tube called the siphuncle. The living chamber contained most of the animal's body and was connected to the phragmocone via the siphuncle. The shell served not only as protection but also as the animal's primary buoyancy mechanism. The chambers contained air or another fluid of lower density than water, allowing the animal to regulate its position in the water column by controlling the amount of fluid in the chambers. This process is similar to how submarines fill or empty their ballast tanks to dive or surface. As the animal grew, the number of chambers increased, the size of the living chamber expanded, and consequently, the size of the shell also grew. Generally, ammonoids had shells that formed a flat spiral, but some species had uncoiled forms or deviated from this typical morphology, showing a wide variety of shapes and ornamentations.\n\n** By making a purchase, you are helping to fund future research on these fascinating creatures.\n If you're interested in exploring more fossil models, feel free to check out my profile for other options.\n**","imageAlt":"Sub evolute Ammonoid shell With Ventral Furrow 3D model","url":"https://www.cgtrader.com/3d-models/animal/other/sub-evolute-ammonoid-shell-with-ventral-furrow","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/XSbwppCFMn4BJiPsVEfQ9FBx/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/1.jpg","gridUrl":"https://media.cgtrader.com/variants/XSbwppCFMn4BJiPsVEfQ9FBx/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/1.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/sub-evolute-ammonoid-shell-with-ventral-furrow","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":12,"name":".obj","is_native":false},{"id":189,"name":".ply","is_native":false},{"id":51,"name":".stl","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5576999/af9760f3a6/sub-evolute-ammonoid-shell-with-ventral-furrow-3d-model-af9760f3a6.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5707595","type":"listingItem","attributes":{"id":5707595,"title":"Ammonoid shell virtual model of Eocanites","price":15.0,"description":"This model emulates the somewhat serpenticonic shell (i.e., shaped like a coiled snake) of Eocanites Librovich, 1957 that shows a subcuadrate whorl profiles. The sutures (i.e., an ammonoid suture is the wavy line of contact between the inner shell wall and the septa, or walls, that separate the chambers in an ammonoid's Shell)  of this group show only eight lobes; two lobes on flanks, first lateral lobe considerately longer than second. Sutural formula: EALUI [German], VLU:ID [Russian].\n\nAmmonoids are a group of mollusks, more specifically cephalopods (which include octopuses, squids, cuttlefish, nautiloids, and others), that inhabited seas and oceans, first appearing in the Devonian period, around 419 million years ago. They went extinct alongside the dinosaurs during the mass extinction at the end of the Cretaceous period, approximately 66 million years ago. Ammonoids were a highly diverse and abundant group. At first glance, they resembled the modern Nautilus species, as they possessed an external shell that housed most of the animal's body. However, they are more closely related to coleoids, the group that includes octopuses, squids, and cuttlefish. Like the modern Nautilus, ammonoids had an external shell made of calcium carbonate (aragonite), subdivided into two components: the phragmocone and the living chamber. The phragmocone was divided internally by septa, which defined chambers connected by a ventral tube called the siphuncle. The living chamber contained most of the animal's body and was connected to the phragmocone via the siphuncle. The shell served not only as protection but also as the animal's primary buoyancy mechanism. The chambers contained air or another fluid of lower density than water, allowing the animal to regulate its position in the water column by controlling the amount of fluid in the chambers. This process is similar to how submarines fill or empty their ballast tanks to dive or surface. As the animal grew, the number of chambers increased, the size of the living chamber expanded, and consequently, the size of the shell also grew. Generally, ammonoids had shells that formed a flat spiral, but some species had uncoiled forms or deviated from this typical morphology, showing a wide variety of shapes and ornamentations. By making a purchase, you are helping to fund future research on these fascinating creatures.\n\n** If you're interested in exploring more fossil models, feel free to check out my profile for other options.**\n","imageAlt":"Ammonoid shell virtual model of Eocanites","url":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-virtual-model-of-eocanites","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/sLoSrmKr2PwXSvragumtr8N2/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0004.jpg","gridUrl":"https://media.cgtrader.com/variants/sLoSrmKr2PwXSvragumtr8N2/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0004.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-virtual-model-of-eocanites","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":12,"name":".obj","is_native":false},{"id":189,"name":".ply","is_native":false},{"id":51,"name":".stl","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5707595/2653a54ff6/ammonoid-shell-virtual-model-of-eocanites-3d-model-2653a54ff6.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5587978","type":"listingItem","attributes":{"id":5587978,"title":"Ammonoid shell with spiral lines","price":15.0,"description":"This model emulates a subevolute ammonoid conch, displaying spiral lines in the ventro-lateral region. In subevolute ammonoids, the whorls are loosely coiled, leading to a shell design where the umbilicus is relatively exposed. \n\nAmmonoids are a group of mollusks, more specifically cephalopods (which include octopuses, squids, cuttlefish, nautiloids, and others), that inhabited seas and oceans, first appearing in the Devonian period, around 419 million years ago. They went extinct alongside the dinosaurs during the mass extinction at the end of the Cretaceous period, approximately 66 million years ago. Ammonoids were a highly diverse and abundant group. At first glance, they resembled the modern Nautilus species, as they possessed an external shell that housed most of the animal's body. However, they are more closely related to coleoids, the group that includes octopuses, squids, and cuttlefish. Like the modern Nautilus, ammonoids had an external shell made of calcium carbonate (aragonite), subdivided into two components: the phragmocone and the living chamber. The phragmocone was divided internally by septa, which defined chambers connected by a ventral tube called the siphuncle. The living chamber contained most of the animal's body and was connected to the phragmocone via the siphuncle. The shell served not only as protection but also as the animal's primary buoyancy mechanism. The chambers contained air or another fluid of lower density than water, allowing the animal to regulate its position in the water column by controlling the amount of fluid in the chambers. This process is similar to how submarines fill or empty their ballast tanks to dive or surface. As the animal grew, the number of chambers increased, the size of the living chamber expanded, and consequently, the size of the shell also grew. Generally, ammonoids had shells that formed a flat spiral, but some species had uncoiled forms or deviated from this typical morphology, showing a wide variety of shapes and ornamentations.\n\n** By making a purchase, you are helping to fund future research on these fascinating creatures.\n**\n\n","imageAlt":"3D model Ammonoid shell with spiral lines","url":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-spiral-lines","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/bKk5Zz8WRXsD2UtYiifCx4g2/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/1.jpg","gridUrl":"https://media.cgtrader.com/variants/bKk5Zz8WRXsD2UtYiifCx4g2/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/1.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-spiral-lines","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":51,"name":".stl","is_native":false},{"id":12,"name":".obj","is_native":false},{"id":189,"name":".ply","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5587978/db4d8274d2/ammonoid-shell-with-spiral-lines-3d-model-db4d8274d2.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5692670","type":"listingItem","attributes":{"id":5692670,"title":"Ammonoid shell involute and depressed Hibernicoceras","price":15.0,"description":"This model emulates the globular conch of Hibernicoceras, an ammonoid that inhabited the oceans during the Early Carboniferous period.\n Ammonoids are a diverse group of extinct cephalopods bearing an external shell similar to Nautilus but closely related to modern coleoids, a group that includes cuttlefishes, octopuses, squids, among others (Hoffmann et al., 2022) . These organisms inhabited the ancient oceans from the Early Devonian to the earliest Palaeogene period, reaching an interval of approximately 350 million years across the Phanerozoic (Landman et al., 2015; Lehmann, 2015). Fossils of this external conch represent one of the most common findings in marine assemblages, showing a highly diverse and abundant record around the world (Saunders \u0026 Swan, 1984; Saunders et al., 2004; Korn \u0026 Klug, 2012; Morón-Alfonso et al., 2023, figs. 3-4).  Because the ammonoid conch grew along with the animal soft-body, this structure frequently records valuable information including morphological modifications that occurred during ontogeny useful to study the paleobiology and paleoecology of this group (Kullmann \u0026 Scheuch, 1970; Kant, 1973; Korn, 2012; Erlich et al., 2016). By making a purchase, you are helping to fund future research on these fascinating creatures. If you're interested in exploring more fossil models, feel free to check out my profile for other options.\n","imageAlt":"3D model Ammonoid shell involute and depressed","url":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-involute-and-depressed-hibernicoceras","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/UQKJ98uweC2nUuC4UD3VFnTf/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0%20%284%29.jpg","gridUrl":"https://media.cgtrader.com/variants/UQKJ98uweC2nUuC4UD3VFnTf/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0%20%284%29.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-involute-and-depressed-hibernicoceras","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":12,"name":".obj","is_native":false},{"id":51,"name":".stl","is_native":false},{"id":189,"name":".ply","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5692670/3be86e604b/ammonoid-shell-involute-and-depressed-hibernicoceras-3d-model-3be86e604b.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"4996253","type":"listingItem","attributes":{"id":4996253,"title":"Serpenticone shell ornamented ventral ribs","price":15.0,"description":"Name of the model: \"Serpenticone Conch Ornamented\"\nTriangles: 1408708\nVertices: 704356\nInformation: This model emulates a serpenticonic conch with an ornamented shell surface (ribs and nodes). According to Westermann (1996) Serpenticonic shells are evolute, with much of the umbilicus exposed. This has been shown to generate excessive drag against propulsion (Jacobs 1992). The shell form is overall fairly compressed, even if the aperture itself is not compressed. The venter does not produce as much drag, and at larger sizes, less energy would be required for propulsion because turbulent flow would de-emphasize friction drag along the umbilicus (Jacobs 1992). \n","imageAlt":"3D print model Serpenticone shell ornamented ventral ribs","url":"https://www.cgtrader.com/3d-print-models/science/biology/serpenticone-shell-ornamented-ventral-ribs","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/35sigVsCVCK3jqSSDeWPAxRX/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0005.jpg","gridUrl":"https://media.cgtrader.com/variants/35sigVsCVCK3jqSSDeWPAxRX/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0005.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-print-models/science/biology/serpenticone-shell-ornamented-ventral-ribs","isCgtVerified":false,"types":{"printReady":true,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":100,"name":".pdf","is_native":false},{"id":51,"name":".stl","is_native":false}],"categorySlug":"science","subcategorySlug":"biology","categoryTitle":"Science","subcategoryTitle":"Biology","schemaImageUrl":"https://img-new.cgtrader.com/items/4996253/3bb4ebcced/serpenticone-shell-ornamented-ventral-ribs-3d-model-3bb4ebcced.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5613131","type":"listingItem","attributes":{"id":5613131,"title":"Ammonoid shell with ventral ribs and lappets","price":15.0,"description":"This model emulates a subevolute ammonoid conch, showing soft ventral ribs and lappets. Lappets are projections of the aperture’s margins of the male ammonites, and they are hypothesized to function as reproductive structures, either for display or stabilization.\nAmmonoids are a group of mollusks, more specifically cephalopods (which include octopuses, squids, cuttlefish, nautiloids, and others), that inhabited seas and oceans, first appearing in the Devonian period, around 419 million years ago. They went extinct alongside the dinosaurs during the mass extinction at the end of the Cretaceous period, approximately 66 million years ago. Ammonoids were a highly diverse and abundant group. At first glance, they resembled the modern Nautilus species, as they possessed an external shell that housed most of the animal's body. However, they are more closely related to coleoids, the group that includes octopuses, squids, and cuttlefish. Like the modern Nautilus, ammonoids had an external shell made of calcium carbonate (aragonite), subdivided into two components: the phragmocone and the living chamber. The phragmocone was divided internally by septa, which defined chambers connected by a ventral tube called the siphuncle. The living chamber contained most of the animal's body and was connected to the phragmocone via the siphuncle. The shell served not only as protection but also as the animal's primary buoyancy mechanism. The chambers contained air or another fluid of lower density than water, allowing the animal to regulate its position in the water column by controlling the amount of fluid in the chambers. This process is similar to how submarines fill or empty their ballast tanks to dive or surface. As the animal grew, the number of chambers increased, the size of the living chamber expanded, and consequently, the size of the shell also grew. Generally, ammonoids had shells that formed a flat spiral, but some species had uncoiled forms or deviated from this typical morphology, showing a wide variety of shapes and ornamentations. \n\n**By making a purchase, you are helping to fund future research on these fascinating creatures.\nIf you're interested in exploring more fossil models, feel free to check out my profile for other options.**\n","imageAlt":"3D model Ammonoid shell with ventral ribs and","url":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-ventral-ribs-and-lappets","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/7gNYbCT8DiMmpbVCRtQKXVgs/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0%20%285%29.jpg","gridUrl":"https://media.cgtrader.com/variants/7gNYbCT8DiMmpbVCRtQKXVgs/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0%20%285%29.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-with-ventral-ribs-and-lappets","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":51,"name":".stl","is_native":false},{"id":12,"name":".obj","is_native":false},{"id":189,"name":".ply","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5613131/b947a4e6c4/ammonoid-shell-with-ventral-ribs-and-lappets-3d-model-b947a4e6c4.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5008624","type":"listingItem","attributes":{"id":5008624,"title":"Discocone Shell Ribbing Pattern 2","price":15.0,"description":"Name of the model: \"Discocone Conch Ornamented 2\"\nTriangles:  1285354\nVertices: 642679\nInformation: This model emulates an almost oxyconic conch known as discocone with ornamentation (ribs of three orders). In oxycones the umbilicus is not well exposed, and the overall shell form is compressed. According to Westermann (1996) the whorl height shows pronounced expansion during accretion of the recent 180° of shell whorl. Oxycones would have offered higher stability and maneuverability than other forms, and generally a short body chamber.\nReferences:\nWestermann GEG. 1996. Ammonoid Life and Habitat. Pages 607-707 in Landman NH, Tanabe K, Davis RA, eds. Ammonoid Paleobiology. Boston, MA: Springer US.\n\n","imageAlt":"Discocone Shell Ribbing Pattern 2 3D print model","url":"https://www.cgtrader.com/3d-print-models/science/biology/discocone-shell-ribbing-pattern-2","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/fguXhwxE3n6ognuEh7TVKKx8/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/000.jpg","gridUrl":"https://media.cgtrader.com/variants/fguXhwxE3n6ognuEh7TVKKx8/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/000.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-print-models/science/biology/discocone-shell-ribbing-pattern-2","isCgtVerified":false,"types":{"printReady":true,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":12,"name":".obj","is_native":false},{"id":51,"name":".stl","is_native":false},{"id":100,"name":".pdf","is_native":false}],"categorySlug":"science","subcategorySlug":"biology","categoryTitle":"Science","subcategoryTitle":"Biology","schemaImageUrl":"https://img-new.cgtrader.com/items/5008624/be8933bce7/discocone-shell-ribbing-pattern-2-3d-model-be8933bce7.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"4996216","type":"listingItem","attributes":{"id":4996216,"title":"Serpenticone Shell Ornamented","price":15.0,"description":"Name of the model: \" Serpenticone Conch Ornamented\"\nSTL ready to print\nTriangles: 945365\nVertices: 604826\nInformation: This model emulates a serpenticonic conch with an ornamented shell surface (ribs\nand nodes). According to Westermann (1996) Serpenticonic shells are evolute, with much of the\numbilicus exposed. This has been shown to generate excessive drag against propulsion (Jacobs\n1992). The shell form is overall fairly compressed, even if the aperture itself is not compressed.\nThe venter does not produce as much drag, and at larger sizes, less energy would be required for\npropulsion because turbulent flow would de-emphasize friction drag along the umbilicus (Jacobs\n1992).","imageAlt":null,"url":"https://www.cgtrader.com/3d-print-models/science/biology/serpenticone-shell-ornamented","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/9GLfZA5SRK3y1pReNnCvvhzG/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0001.jpg","gridUrl":"https://media.cgtrader.com/variants/9GLfZA5SRK3y1pReNnCvvhzG/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0001.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-print-models/science/biology/serpenticone-shell-ornamented","isCgtVerified":false,"types":{"printReady":true,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":100,"name":".pdf","is_native":false},{"id":51,"name":".stl","is_native":false}],"categorySlug":"science","subcategorySlug":"biology","categoryTitle":"Science","subcategoryTitle":"Biology","schemaImageUrl":"https://img-new.cgtrader.com/items/4996216/b0f06e3449/serpenticone-shell-ornamented-3d-model-b0f06e3449.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5676907","type":"listingItem","attributes":{"id":5676907,"title":"Ammonoid shell involute and compressed Prodromites","price":15.0,"description":"This model emulates the extremely involute ammonoid shell of Prodromites.  The Carboniferous genus Prodromites is characterized by its laterally compressed, discoidal, involute, deeply-embracing whorls, narrow umbilicus, high, hollow abdominal keel, and complex, ceratitic septa. Where the keel is broken off, as is usually the case, the abdomen is narrow, slightly flattened, and angular. The surface, so far as known, is smooth, and destitute of ribs, constrictions, or other ornamentation.\n Ammonoids are a diverse group of extinct cephalopods bearing an external shell similar to Nautilus but closely related to modern coleoids, a group that includes cuttlefishes, octopuses, squids, among others (Hoffmann et al., 2022) . These organisms inhabited the ancient oceans from the Early Devonian to the earliest Palaeogene period, reaching an interval of approximately 350 million years across the Phanerozoic (Landman et al., 2015; Lehmann, 2015). Fossils of this external conch represent one of the most common findings in marine assemblages, showing a highly diverse and abundant record around the world (Saunders \u0026 Swan, 1984; Saunders et al., 2004; Korn \u0026 Klug, 2012; Morón-Alfonso et al., 2023, figs. 3-4).  Because the ammonoid conch grew along with the animal soft-body, this structure frequently records valuable information including morphological modifications that occurred during ontogeny useful to study the paleobiology and paleoecology of this group (Kullmann \u0026 Scheuch, 1970; Kant, 1973; Korn, 2012; Erlich et al., 2016). By making a purchase, you are helping to fund future research on these fascinating creatures. If you're interested in exploring more fossil models, feel free to check out my profile for other options.\n","imageAlt":"Ammonoid shell involute and compressed Prodromites 3D","url":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-involute-and-compressed-prodromites","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/tEvqtZZsAVMLMAKpHoHq21rt/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0%20%281%29.jpg","gridUrl":"https://media.cgtrader.com/variants/tEvqtZZsAVMLMAKpHoHq21rt/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0%20%281%29.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-involute-and-compressed-prodromites","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":12,"name":".obj","is_native":false},{"id":51,"name":".stl","is_native":false},{"id":189,"name":".ply","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5676907/452bebc13f/ammonoid-shell-involute-and-compressed-prodromites-3d-model-452bebc13f.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5685422","type":"listingItem","attributes":{"id":5685422,"title":"Ammonoid shell involute and depressed Somoholites","price":15.0,"description":"**Information**: This model emulates the pachyconic ammonoid shell of Somoholites. This Devonian genus is characterized by a small conch with depressed whorls and broadly rounded venter and very marked umbilical shoulders. \n Ammonoids are a diverse group of extinct cephalopods bearing an external shell similar to Nautilus but closely related to modern coleoids, a group that includes cuttlefishes, octopuses, squids, among others (Hoffmann et al., 2022) . These organisms inhabited the ancient oceans from the Early Devonian to the earliest Palaeogene period, reaching an interval of approximately 350 million years across the Phanerozoic (Landman et al., 2015; Lehmann, 2015). Fossils of this external conch represent one of the most common findings in marine assemblages, showing a highly diverse and abundant record around the world (Saunders \u0026 Swan, 1984; Saunders et al., 2004; Korn \u0026 Klug, 2012; Morón-Alfonso et al., 2023, figs. 3-4).  Because the ammonoid conch grew along with the animal soft-body, this structure frequently records valuable information including morphological modifications that occurred during ontogeny useful to study the paleobiology and paleoecology of this group (Kullmann \u0026 Scheuch, 1970; Kant, 1973; Korn, 2012; Erlich et al., 2016). By making a purchase, you are helping to fund future research on these fascinating creatures. If you're interested in exploring more fossil models, feel free to check out my profile for other options.\nReferences:\nErlich, A., Moulton, D. E., Goriely, A., \u0026 Chirat, R., 2016, Morphomechanics and developmental constraints in the evolution of ammonites shell form: Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, v. 326, p. 437-450.\nHoffmann, R., Howarth, M., Fuchs, D., Klug, C., \u0026 Korn, D., 2022, The higher taxonomic nomenclature of Devonian to Cretaceous ammonoids and Jurassic to Cretaceous ammonites including their authorship and publication: Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, v. 305, p. 187-197.\nKant, R., 1973, Allometrisches Wachstum paläozoischer Ammonoideen: Variabilität und Korrelation einiger Merkmale: Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen, v. 143, p. 153-192.\nKlug, C., Korn, D., Landman, N. H., Tanabe, K., De Baets, K., \u0026 Naglik, C., 2015, Describing Ammonoid Conchs, in Klug, C., Korn, D., De Baets, K., Kruta, I., \u0026 Mapes, R. H., eds., Ammonoid Paleobiology: From anatomy to ecology. Topics in Geobiology, vol 43, Volume Topics in Geobiology, vol 43: Dordrecht, Springer Netherlands, p. 3-24.\nKorn, D., 2012, Quantification of ontogenetic allometry in ammonoids, v. 14, p. 501-514.\nKorn, D., \u0026 Klug, C., 2012, Palaeozoic ammonoids – diversity and development of conch morphology, in Talent, J. A., ed., Earth and Life: Global Biodiversity, Extinction Intervals and Biogeographic Perturbations Through Time, Volume 1: Dordrecht, Springer Netherlands, p. 491-534.\nKullmann, J., \u0026 Scheuch, J., 1970, Wachstums-änderungen in der onto-genese paläozoischer ammonoideen: Lethaia, v. 3, no. 4, p. 397-412.\nLandman, N. H., Goolaerts, S., Jagt, J. W. M., Jagt-Yazykova, E. A., \u0026 Machalski, M., 2015, Ammonites on the Brink of Extinction: Diversity, Abundance, and Ecology of the Order Ammonoidea at the Cretaceous/Paleogene (K/Pg) Boundary, in Klug, C., Korn, D., De Baets, K., Kruta, I., \u0026 Mapes, R. H., eds., Ammonoid Paleobiology: From macroevolution to paleogeography: Dordrecht, Springer Netherlands, p. 497-553.\nLehmann, J., 2015, Ammonite Biostratigraphy of the Cretaceous—An Overview, in Klug, C., Korn, D., De Baets, K., Kruta, I., \u0026 Mapes, R. H., eds., Ammonoid Paleobiology: From macroevolution to paleogeography. Topics in Geobiology, vol 43: Dordrecht, Springer Netherlands, p. 403-429.\nMorón-Alfonso, D., Cichowolski, M., Hoffmann, R., Korn, D., Vennari, V., \u0026 Allaire, N., 2023, The intriguing shapes of the ammonoid whorl: Palaeontologia Electronica, v. 26, p. 1-23.\nSaunders, W. B., \u0026 Swan, A. R. H., 1984, Morphology and Morphologic Diversity of Mid-Carboniferous (Namurian) Ammonoids in Time and Space: Paleobiology, v. 10, p. 195-128.\nSaunders, W. B., Work, D. M., \u0026 Svetlana, V. N., 2004, The Evolutionary History of Shell Geometry in Paleozoic Ammonoids: Paleobiology, v. 30, p. 19-43.\n\n","imageAlt":"3D model Ammonoid shell involute and depressed Somoholites","url":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-involute-and-depressed-somoholites","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/5estn5ojp5ddhjvnhn113lm2lemi/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/ammonoid-shell-involute-and-depressed-somoholites-3d-model-6480cb9ea1.jpg","gridUrl":"https://media.cgtrader.com/variants/5estn5ojp5ddhjvnhn113lm2lemi/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/ammonoid-shell-involute-and-depressed-somoholites-3d-model-6480cb9ea1.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/ammonoid-shell-involute-and-depressed-somoholites","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":12,"name":".obj","is_native":false},{"id":189,"name":".ply","is_native":false},{"id":51,"name":".stl","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5685422/6480cb9ea1/ammonoid-shell-involute-and-depressed-somoholites-3d-model-6480cb9ea1.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"4997567","type":"listingItem","attributes":{"id":4997567,"title":"Tumaricone Shell Ventral Nodes","price":15.0,"description":"Name of the model: \" Tumaricone Conch Ornamented\"\nTriangles: 1216312\nVertices: 608156\nInformation: This model emulates an almost spherocone to cadicone conch known as\ntumaricone, with an ornamented shell surface (ribs and nodes). According to Westermann (1996)\nSpherocone shells are overall inflated, and may be wider than the planispiral diameter.\nSpherocones have most or all of the umbilicus covered. Locomotion would be optimized at low\nspeeds (Jacobs 1992). At very small sizes, such as hatching size, viscosity ensures laminar flow,\nand a lower friction drag makes the sphaerocone more efficient than compressed forms (Jacobs\n1992).\nReferences:\nJacobs DK. 1992. Shape, Drag, and Power in Ammonoid Swimming. Paleobiology 18: 203-220.\nWestermann GEG. 1996. Ammonoid Life and Habitat. Pages 607-707 in Landman NH, Tanabe\nK, Davis RA, eds. Ammonoid Paleobiology. Boston, MA: Springer US.","imageAlt":"Tumaricone Shell Ventral Nodes 3D print model","url":"https://www.cgtrader.com/3d-print-models/science/biology/tumaricone-shell-ventral-nodes","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/f8MQVG8q46LSHjWMaeQhhovT/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0001.jpg","gridUrl":"https://media.cgtrader.com/variants/f8MQVG8q46LSHjWMaeQhhovT/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0001.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-print-models/science/biology/tumaricone-shell-ventral-nodes","isCgtVerified":false,"types":{"printReady":true,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":100,"name":".pdf","is_native":false},{"id":51,"name":".stl","is_native":false}],"categorySlug":"science","subcategorySlug":"biology","categoryTitle":"Science","subcategoryTitle":"Biology","schemaImageUrl":"https://img-new.cgtrader.com/items/4997567/062d99a341/tumaricone-shell-ventral-nodes-3d-model-062d99a341.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"4998707","type":"listingItem","attributes":{"id":4998707,"title":"Discocone shell ornamented","price":15.0,"description":"Name of the model: \"Discocone Shell Ornamented\"\nTriangles:  2651452\nVertices: 7954356\nInformation: This model emulates a discocone conch with ornamentation (complete and intercalar ribs). In discocones the umbilicus is not well exposed, and the overall shell form is compressed. According to Westermann (1996) the whorl height shows pronounced expansion during accretion of the recent 180° of shell whorl. Discocone would have offered higher stability and maneuverability than other forms.\n","imageAlt":"3D printable model Discocone shell ornamented","url":"https://www.cgtrader.com/3d-print-models/science/biology/discocone-shell-ornamented","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/4qJLyaQDMHrFbQ7J6NvXR1YZ/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0000.jpg","gridUrl":"https://media.cgtrader.com/variants/4qJLyaQDMHrFbQ7J6NvXR1YZ/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0000.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-print-models/science/biology/discocone-shell-ornamented","isCgtVerified":false,"types":{"printReady":true,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":12,"name":".obj","is_native":false},{"id":100,"name":".pdf","is_native":false}],"categorySlug":"science","subcategorySlug":"biology","categoryTitle":"Science","subcategoryTitle":"Biology","schemaImageUrl":"https://img-new.cgtrader.com/items/4998707/e06331cbd0/discocone-shell-ornamented-3d-model-e06331cbd0.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5008662","type":"listingItem","attributes":{"id":5008662,"title":"Oxicone Shell Ribbing pattern 3","price":15.0,"description":"Name of the model: \" Discocone Conch Ornamented 3\"\nTriangles: 1281432\nVertices: 640718\nInformation: This model emulates an almost oxyconic conch known as discocone with\nornamentation (Dichotomous ribs). In oxycones the umbilicus is not well exposed, and the\noverall shell form is compressed. According to Westermann (1996) the whorl height shows\npronounced expansion during accretion of the recent 180° of shell whorl. Oxycones would have\noffered higher stability and maneuverability than other forms, and generally a short body\nchamber.\nReferences:\nWestermann GEG. 1996. Ammonoid Life and Habitat. Pages 607-707 in Landman NH, Tanabe\nK, Davis RA, eds. Ammonoid Paleobiology. Boston, MA: Springer US.","imageAlt":null,"url":"https://www.cgtrader.com/3d-print-models/science/biology/oxicone-shell-ribbing-pattern-3","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/VPfKzCNQXjgwJ6yEKAPetqBn/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/000.jpg","gridUrl":"https://media.cgtrader.com/variants/VPfKzCNQXjgwJ6yEKAPetqBn/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/000.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-print-models/science/biology/oxicone-shell-ribbing-pattern-3","isCgtVerified":false,"types":{"printReady":true,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":51,"name":".stl","is_native":false},{"id":12,"name":".obj","is_native":false}],"categorySlug":"science","subcategorySlug":"biology","categoryTitle":"Science","subcategoryTitle":"Biology","schemaImageUrl":"https://img-new.cgtrader.com/items/5008662/36b4118d1b/oxicone-shell-ribbing-pattern-3-3d-model-36b4118d1b.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"4991851","type":"listingItem","attributes":{"id":4991851,"title":"Oxicone Shell Ornamented Ribs","price":15.0,"description":"This model emulates an oxyconic conch with ornamentation (sinuous and intercalar ribs). In oxycones the umbilicus is not well exposed, and the overall shell form is compressed. According to Westermann (1996) the whorl height shows pronounced expansion\nduring accretion of the recent 180° of shell whorl. Oxycones would have offered higher stability\nand maneuverability than other forms, and generally a short body chamber.","imageAlt":"3D printable model Oxicone Shell Ornamented Ribs","url":"https://www.cgtrader.com/3d-print-models/science/biology/oxicone-conch-ornamented","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/qMyLMLea1XRqejoyzDoefAqm/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0005.jpg","gridUrl":"https://media.cgtrader.com/variants/qMyLMLea1XRqejoyzDoefAqm/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0005.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-print-models/science/biology/oxicone-conch-ornamented","isCgtVerified":false,"types":{"printReady":true,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":100,"name":".pdf","is_native":false},{"id":51,"name":".stl","is_native":false}],"categorySlug":"science","subcategorySlug":"biology","categoryTitle":"Science","subcategoryTitle":"Biology","schemaImageUrl":"https://img-new.cgtrader.com/items/4991851/5238eb1271/oxicone-shell-ornamented-ribs-3d-model-5238eb1271.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5001164","type":"listingItem","attributes":{"id":5001164,"title":"Discocone wide","price":15.0,"description":"Name of the model: \"Discocone Conch Smooth\"\nTriangles: 1091704\nVertices: 3275112\nInformation: This model emulates an almost oxyconic conch known as discocone. In oxycones the umbilicus is not well exposed, and the overall shell form is depressed. According to Westermann (1996) the whorl height shows pronounced expansion during accretion of the recent 180° of shell whorl. Oxycones would have offered higher stability and maneuverability than other forms, and generally a short body chamber.\nReferences:\nWestermann GEG. 1996. Ammonoid Life and Habitat. Pages 607-707 in Landman NH, Tanabe K, Davis RA, eds. Ammonoid Paleobiology. Boston, MA: Springer US.","imageAlt":"Discocone wide 3D printable model","url":"https://www.cgtrader.com/3d-print-models/science/other/discocone-wide","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/JQfpDAHPf2fLgUSSJU4ZYrQe/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0000.jpg","gridUrl":"https://media.cgtrader.com/variants/JQfpDAHPf2fLgUSSJU4ZYrQe/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0000.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-print-models/science/other/discocone-wide","isCgtVerified":false,"types":{"printReady":true,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":51,"name":".stl","is_native":false},{"id":12,"name":".obj","is_native":false},{"id":100,"name":".pdf","is_native":false}],"categorySlug":"science","subcategorySlug":"other","categoryTitle":"Science","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5001164/e51f0dc85a/discocone-wide-3d-model-e51f0dc85a.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5001115","type":"listingItem","attributes":{"id":5001115,"title":"Discocone ornamented ribbing pattern I","price":15.0,"description":"Name of the model: \" Discocone Conch Ornamented\"\nTriangles: 1285354\nVertices: 642679\nInformation: This model emulates an almost oxyconic conch known as discocone with\nornamentation (ribs of three orders). In oxycones the umbilicus is not well exposed, and the\noverall shell form is compressed. According to Westermann (1996) the whorl height shows\npronounced expansion during accretion of the recent 180° of shell whorl. Oxycones would have\noffered higher stability and maneuverability than other forms, and generally a short body\nchamber.\nReferences:\nWestermann GEG. 1996. Ammonoid Life and Habitat. Pages 607-707 in Landman NH, Tanabe\nK, Davis RA, eds. Ammonoid Paleobiology. Boston, MA: Springer US.","imageAlt":"Discocone ornamented ribbing pattern I 3D printable model","url":"https://www.cgtrader.com/3d-print-models/science/other/discocone-ornamented-ribbing-pattern-i","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/EaT6ghz6GBcVgruDDjFajUTb/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0000.jpg","gridUrl":"https://media.cgtrader.com/variants/EaT6ghz6GBcVgruDDjFajUTb/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0000.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-print-models/science/other/discocone-ornamented-ribbing-pattern-i","isCgtVerified":false,"types":{"printReady":true,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":12,"name":".obj","is_native":false},{"id":51,"name":".stl","is_native":false},{"id":100,"name":".pdf","is_native":false}],"categorySlug":"science","subcategorySlug":"other","categoryTitle":"Science","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5001115/d55d1f34b7/discocone-ornamented-ribbing-pattern-i-3d-model-d55d1f34b7.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5001078","type":"listingItem","attributes":{"id":5001078,"title":"Discocone shell smooth surface","price":15.0,"description":"Name of the model: \" Discocone Conch Smooth\"\nTriangles: 377352\nVertices: 188678\nInformation: This model emulates an almost oxyconic conch known as discocone. In oxycones\nthe umbilicus is not well exposed, and the overall shell form is compressed. According to\nWestermann (1996) the whorl height shows pronounced expansion during accretion of the recent\n180° of shell whorl. Oxycones would have offered higher stability and maneuverability than\nother forms, and generally a short body chamber.\nReferences:\nWestermann GEG. 1996. Ammonoid Life and Habitat. Pages 607-707 in Landman NH, Tanabe\nK, Davis RA, eds. Ammonoid Paleobiology. Boston, MA: Springer US.","imageAlt":"Discocone shell smooth surface 3D print model","url":"https://www.cgtrader.com/3d-print-models/science/other/discocone-shell-smooth-surface","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/3k51Nuo6BxNVRJjS4Rf7RzMj/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0000.jpg","gridUrl":"https://media.cgtrader.com/variants/3k51Nuo6BxNVRJjS4Rf7RzMj/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0000.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-print-models/science/other/discocone-shell-smooth-surface","isCgtVerified":false,"types":{"printReady":true,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":100,"name":".pdf","is_native":false},{"id":12,"name":".obj","is_native":false},{"id":51,"name":".stl","is_native":false}],"categorySlug":"science","subcategorySlug":"other","categoryTitle":"Science","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5001078/4bac60f2b8/discocone-shell-smooth-surface-3d-model-4bac60f2b8.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"4991838","type":"listingItem","attributes":{"id":4991838,"title":"Discocone Shell Ornamented Spines","price":15.0,"description":"Ornamented ammonoid discocone conch with spiral spines, ideal for 3D printing, crafted in Blender and manually sculpted. This 3D model replicates an ammonite conch fairly compressed and typically adorned with various types of ornamentation. In this case, the ornamentation elements are constitued by four rows of spines following a spiral disposition. \n","imageAlt":"Discocone Shell Ornamented Spines 3D printable model","url":"https://www.cgtrader.com/3d-print-models/science/biology/discocone-conch-ornamented-spines","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/tqUd4NRsKQHNUGU3C3ZQQJiE/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0005.jpg","gridUrl":"https://media.cgtrader.com/variants/tqUd4NRsKQHNUGU3C3ZQQJiE/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0005.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-print-models/science/biology/discocone-conch-ornamented-spines","isCgtVerified":false,"types":{"printReady":true,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":12,"name":".obj","is_native":false}],"categorySlug":"science","subcategorySlug":"biology","categoryTitle":"Science","subcategoryTitle":"Biology","schemaImageUrl":"https://img-new.cgtrader.com/items/4991838/fd49535aa7/discocone-shell-ornamented-spines-3d-model-fd49535aa7.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5003187","type":"listingItem","attributes":{"id":5003187,"title":"Serpenticone Shell Smooth Surface","price":15.0,"description":"Name of the model: \" Serpenticone Conch Smooth\"\nTriangles: 1387578\nVertices: 693790\nInformation: This model emulates a serpenticonic conch with a smooth shell surface (ribs and\nnodes). According to Westermann (1996) Serpenticonic shells are evolute, with much of the\numbilicus exposed. This has been shown to generate excessive drag against propulsion (Jacobs\n1992). The shell form is overall fairly compressed, even if the aperture itself is not compressed.\nThe venter does not produce as much drag, and at larger sizes, less energy would be required for\npropulsion because turbulent flow would de-emphasize friction drag along the umbilicus (Jacobs\n1992).","imageAlt":"3D print model Serpenticone Shell Smooth Surface","url":"https://www.cgtrader.com/3d-print-models/science/biology/serpenticone-shell-smooth-surface","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/P8MCKRzPK1g8ZSsv67EJthDZ/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0000.jpg","gridUrl":"https://media.cgtrader.com/variants/P8MCKRzPK1g8ZSsv67EJthDZ/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0000.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-print-models/science/biology/serpenticone-shell-smooth-surface","isCgtVerified":false,"types":{"printReady":true,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":100,"name":".pdf","is_native":false},{"id":51,"name":".stl","is_native":false},{"id":12,"name":".obj","is_native":false}],"categorySlug":"science","subcategorySlug":"biology","categoryTitle":"Science","subcategoryTitle":"Biology","schemaImageUrl":"https://img-new.cgtrader.com/items/5003187/cb4bd32f01/serpenticone-shell-smooth-surface-3d-model-cb4bd32f01.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"4997579","type":"listingItem","attributes":{"id":4997579,"title":"Spherocone Conch Ornamented","price":15.0,"description":"Name of the model: \" Spherocone Conch Ornamented\"\nTriangles: 1216312\nVertices: 608156\nInformation: This model emulates an almost spherocone conch with an ornamented shell surface (umbilical ribs). According to Westermann (1996) Spherocone shells are overall inflated, and may be wider than the planispiral diameter. Spherocones have most or all of the umbilicus covered. Locomotion would be optimized at low speeds (Jacobs 1992). At very small sizes, such as hatching size, viscosity ensures laminar flow, and a lower friction drag makes the sphaerocone more efficient than compressed forms (Jacobs 1992).\n","imageAlt":"Spherocone Conch Ornamented 3D print model","url":"https://www.cgtrader.com/3d-print-models/science/biology/spherocone-conch-ornamented","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/erdLUGyQAYHoMeqgxQAgP6zP/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0005.jpg","gridUrl":"https://media.cgtrader.com/variants/erdLUGyQAYHoMeqgxQAgP6zP/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0005.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-print-models/science/biology/spherocone-conch-ornamented","isCgtVerified":false,"types":{"printReady":true,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":100,"name":".pdf","is_native":false},{"id":51,"name":".stl","is_native":false}],"categorySlug":"science","subcategorySlug":"biology","categoryTitle":"Science","subcategoryTitle":"Biology","schemaImageUrl":"https://img-new.cgtrader.com/items/4997579/9aa0fca56f/spherocone-conch-ornamented-3d-model-9aa0fca56f.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5008784","type":"listingItem","attributes":{"id":5008784,"title":"Radiolaria Polycistina Acantharea","price":30.0,"description":"Name of the specimen: Acantharea model\nSTL properties\nTriangles: 1175552\nVertices: 586296\nInformation: The Radiolaria, also called Radiozoa, are protozoa of diameter 0.1–0.2 mm that\nproduce intricate mineral skeletons, typically with a central capsule dividing the cell into the\ninner and outer portions of endoplasm and ectoplasm. The elaborate mineral skeleton is usually\nmade of silica. They are found as zooplankton throughout the ocean, and their skeletal remains\nmake up a large part of the cover of the ocean floor as siliceous ooze. Due to their rapid change\nas species, they represent an important diagnostic fossil found from the Cambrian onwards.\nAge: Cambrian to Recent\nHabitat: Marine","imageAlt":"3D model Radiolaria Polycistina Acantharea","url":"https://www.cgtrader.com/3d-models/animal/other/radiolaria-polycistina-acantharea","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/yKs2Z8Btabz4BHeq9KpZXmME/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/1.jpg","gridUrl":"https://media.cgtrader.com/variants/yKs2Z8Btabz4BHeq9KpZXmME/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/1.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/animal/other/radiolaria-polycistina-acantharea","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":12,"name":".obj","is_native":false},{"id":51,"name":".stl","is_native":false},{"id":100,"name":".pdf","is_native":false}],"categorySlug":"animal","subcategorySlug":"other","categoryTitle":"Animals","subcategoryTitle":"Other","schemaImageUrl":"https://img-new.cgtrader.com/items/5008784/e40d0aeeb7/radiolaria-polycistina-acantharea-3d-model-e40d0aeeb7.webp","saleOffDiscount":70,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"4998665","type":"listingItem","attributes":{"id":4998665,"title":"Tumaricone shell Smooth Surface","price":15.0,"description":"Name of the model: \"Tumaricone Conch Smooth\"\nTriangles: 1011704\nVertices: 505854\nInformation: This model emulates an almost spherocone to cadicone conch known as\ntumaricone, with an smooth shell surface. According to Westermann (1996) Spherocone shells\nare overall inflated, and may be wider than the planispiral diameter. Spherocones have most or\nall of the umbilicus covered. Locomotion would be optimized at low speeds (Jacobs 1992). At\nvery small sizes, such as hatching size, viscosity ensures laminar flow, and a lower friction drag\nmakes the sphaerocone more efficient than compressed forms (Jacobs 1992).","imageAlt":"3D print model Tumaricone shell Smooth Surface","url":"https://www.cgtrader.com/3d-print-models/science/biology/tumaricone-shell-smooth-surface","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/zcLD2hEeKYEJyDYqeeKBfEjL/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/0000.jpg","gridUrl":"https://media.cgtrader.com/variants/zcLD2hEeKYEJyDYqeeKBfEjL/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/0000.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-print-models/science/biology/tumaricone-shell-smooth-surface","isCgtVerified":false,"types":{"printReady":true,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":100,"name":".pdf","is_native":false},{"id":51,"name":".stl","is_native":false}],"categorySlug":"science","subcategorySlug":"biology","categoryTitle":"Science","subcategoryTitle":"Biology","schemaImageUrl":"https://img-new.cgtrader.com/items/4998665/b6797b1c7a/tumaricone-shell-smooth-surface-3d-model-b6797b1c7a.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":false,"subscriptionPotential":true,"subscriptionTierBand":"premium"}},{"id":"5044736","type":"listingItem","attributes":{"id":5044736,"title":"Ammonite fossil","price":4.0,"description":"3D model of a ammonite fossil.\nGenerated from a photogrammetric scan and edited/rendered in 3ds max with V-ray (4.30)\n\nTexture size: 4667x4667 pixels - 27.4mb","imageAlt":"3D Ammonite fossil","url":"https://www.cgtrader.com/3d-models/scanned/various/ammonite-fossil-ecf996d1-655d-484a-b64b-aeaf75f5342c","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/DMcjFMJmVbwMSHF6tpeGWWGP/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/preview1.jpg","gridUrl":"https://media.cgtrader.com/variants/DMcjFMJmVbwMSHF6tpeGWWGP/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/preview1.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-models/scanned/various/ammonite-fossil-ecf996d1-655d-484a-b64b-aeaf75f5342c","isCgtVerified":false,"types":{"printReady":false,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":17,"name":".max","is_native":true},{"id":12,"name":".obj","is_native":false},{"id":5,"name":".fbx","is_native":false}],"categorySlug":"scanned","subcategorySlug":"various","categoryTitle":"Scanned 3D Models","subcategoryTitle":"Various","schemaImageUrl":"https://img-new.cgtrader.com/items/5044736/23de0781e6/ammonite-fossil-3d-model-23de0781e6.webp","saleOffDiscount":50,"eligibleForSubscription":true,"subscriptionSubscribed":true,"subscriptionPotential":false,"subscriptionTierBand":"essentials"}},{"id":"4578110","type":"listingItem","attributes":{"id":4578110,"title":"Ammonite Mineral Fossile - Realistic Printable and Keychain","price":9.0,"description":"Ammonite Mineral Fossile - Jurassic Fossile - Archeology\n\nCreated to simulate a real ammonite fossile in a mineral rock to be used as collectible item. Design based on some real ammonite fossiles Can be used as a realistic copy, or as a keychain (one version included with a hole for keychain/pendant)\nMore fossiles coming in future\n\nOn face is flat for a better printing.\n\nPlease, feel free to rotate and resize as you prefer. This model is made on 120mm size, but you can resize if you prefer. Keychain has a smaller version: 70mm\n\n-fossile: 122x101x18mm\n\n-keychain: 70x59x11mm\n\nYou can damage it even more after print to create more realistic aspect, if you prefer. And you can print it any way you like, looking for references on the internet. I'd suggest a dort looking painting, with darker or lighter painting on the ammonite body\n","imageAlt":"Ammonite Mineral Fossile - Realistic Printable and","url":"https://www.cgtrader.com/3d-print-models/science/biology/ammonite-mineral-fossile-realistic-printable-and-keychain","isCLDApplicable":false,"isSaleOffApplicable":true,"gaAttributes":{},"primaryImage":{"gridFallbackUrl":"https://media.cgtrader.com/variants/oqyN8nw2jonaJw5RGmQYotvo/a26e47dab5f2d22c43d6c5ce4b4b46ecc30c70918878397cba1a10c1e35d7bfc/00main.jpg","gridUrl":"https://media.cgtrader.com/variants/oqyN8nw2jonaJw5RGmQYotvo/78add9c2f02fbd73a43ffb3970be38683c5f15eff6ca849dc78c644f4ff9ce1b/00main.webp","isAdultContent":false},"modelInfo":{"modelUrl":"https://www.cgtrader.com/3d-print-models/science/biology/ammonite-mineral-fossile-realistic-printable-and-keychain","isCgtVerified":false,"types":{"printReady":true,"animated":false,"pbr":false,"rigged":false,"lowPoly":false}},"metaverseFormatsList":[{"id":51,"name":".stl","is_native":false}],"categorySlug":"science","subcategorySlug":"biology","categoryTitle":"Science","subcategoryTitle":"Biology","schemaImageUrl":"https://img-new.cgtrader.com/items/4578110/a1b160ca9d/ammonite-mineral-fossile-realistic-printable-and-keychain-3d-model-a1b160ca9d.webp","saleOffDiscount":30,"eligibleForSubscription":true,"subscriptionSubscribed":true,"subscriptionPotential":false,"subscriptionTierBand":"essentials"}}],"meta":{"totalCount":46,"currentPage":1,"totalPages":1,"perPage":120},"extractingCoreStyles":false,"priceFilter":null,"licenseFilter":null,"sortByValue":"best_match","sortByOptions":[{"value":"best_match","label":"Best Match"},{"value":"sales","label":"Top Selling"},{"value":"newest","label":"Newest"},{"value":"oldest","label":"Oldest"},{"value":"lowest_price","label":"Lower price"},{"value":"highest_price","label":"Higher price"},{"value":"trending","label":"Trending"}],"itemListId":"category_ammonoids","gaList":"ammonoids","filtersOptions":{"pricing":{"label":"Price","filters":[{"value":"premium","label":"Translation missing: en.browser.filters.premium","tagColorClass":"metaverse-listing__count-tag"},{"value":"free","label":"Free","tagColorClass":"metaverse-listing__count-tag"},{"value":"collection","label":"Translation missing: en.browser.filters.collection","tagColorClass":"metaverse-listing__count-tag"},{"value":"sale_off","label":"On sale","tagColorClass":"metaverse-listing__count-tag"},{"value":"subscribed","label":"Subscription","tagColorClass":"metaverse-listing__count-tag"},{"value":"exclude_free","label":"Exclude free","count":null}]},"modelType":{"label":"Type","filters":[{"value":"print_ready","label":"3D print","tagColorClass":"metaverse-listing__count-tag"},{"value":"animated","label":"Animated","tagColorClass":"metaverse-listing__count-tag"},{"value":"pbr","label":"PBR","tagColorClass":"metaverse-listing__count-tag"},{"value":"rigged","label":"Rigged","tagColorClass":"metaverse-listing__count-tag"},{"value":"low_poly","label":"Low-poly","tagColorClass":"metaverse-listing__count-tag"}]},"polygons":{"label":"Poly count","filters":[{"value":"range_0_5000","label":"Up to 5K"},{"value":"range_5000_10000","label":"5 - 10K"},{"value":"range_10000_50000","label":"10 - 50K"},{"value":"range_50000_100000","label":"50 - 100K"},{"value":"range_100000_250000","label":"100 - 250K"},{"value":"more_than_250000","label":"250K+"}]},"fileTypes":{"label":"File formats","isSearchable":true,"filters":[{"value":"21","label":"Blender (.blend)"},{"value":"12","label":"OBJ (.obj, .mtl)"},{"value":"51","label":"Stereolithography (.stl)"},{"value":"5","label":"Autodesk FBX (.fbx)"},{"value":"17","label":"Autodesk 3ds Max (.max)"},{"value":"6","label":"Cinema 4D (.c4d)"},{"value":"11","label":"Autodesk Maya (.ma, .mb)"},{"value":"117","label":"glTF (.gltf, .glb)"},{"value":"14","label":"Sketchup (.skp)"},{"value":"96","label":"UnrealEngine (.uasset)"},{"value":"83","label":"Unity 3D (.unitypackage, .prefab)"},{"value":"127","label":"USDZ (.usdz)"},{"value":"207","label":"USD (.usd)"},{"value":"13","label":"Rhinoceros 3D (.3dm)"},{"value":"2","label":"3D Studio (.3ds)"},{"value":"8","label":"Lightwave (.lwo, .lw, .lws)"},{"value":"25","label":"Collada (.dae)"},{"value":"15","label":"Autodesk Softimage (.hrc, .xsi)"},{"value":"7","label":"DXF (.dxf)"},{"value":"33","label":"Modo (.lxo, .lxl)"},{"value":"4","label":"AutoCAD (.dwg)"},{"value":"47","label":"Shockwave 3D (.w3d)"},{"value":"59","label":"SolidWorks (.sldprt, .sldasm, .slddrw)"},{"value":"54","label":"Vue (.vue)"},{"value":"29","label":"IGES (.ige, .igs, .iges)"},{"value":"28","label":"High-Res Renderings (.hrd)"},{"value":"55","label":"Zbrush (.ztl, .zbp)"},{"value":"40","label":"Poser (.pz3, .pp2)"},{"value":"23","label":"Bryce (.br5, .obp)"},{"value":"35","label":"Maxwell Render (.mxs)"},{"value":"42","label":"Renderman (.rib, .slc, .sl, .slo)"},{"value":"48","label":"Silo (.sia)"},{"value":"60","label":"Cheetah3D (.jas)"},{"value":"63","label":"Leaderwerks (.gmf)"},{"value":"66","label":"Torque 3D (.dts)"},{"value":"67","label":"MilkShape 3D  (.ms3d)"},{"value":"68","label":"Blitz3d (.b3d)"},{"value":"70","label":"Solid Edge (.asm, .par, .psm, .dft)"},{"value":"71","label":"Autodesk Inventor (.iam, .ipt)"},{"value":"72","label":"STEP (.stp)"},{"value":"82","label":"JewelCAD (.jcad, .jcd)"},{"value":"89","label":"3D Coat (.3b)"},{"value":"90","label":"AC3D  (.ac)"},{"value":"91","label":"Artlantis (.atl, .atla, .atlo)"},{"value":"98","label":"Terragen (.tgo)"},{"value":"99","label":"Houdini (.hda, .hip, .bgeo, .geo, .bclip, .clip, .hipnc)"},{"value":"100","label":"PDF (.pdf)"},{"value":"101","label":"Substance Painter (.spp, .sbsar, .spsm)"},{"value":"102","label":"DAZ Studio (.duf)"},{"value":"103","label":"iClone (.iprop, .iAcc, .iCloth, .iAvatar, .iEffect)"},{"value":"104","label":"Alembic (.abc)"},{"value":"107","label":"Autodesk Fusion 360 (.f3d)"},{"value":"108","label":"MDL Material (.mdl)"},{"value":"110","label":"3ds Max macroScript (.ms)"},{"value":"111","label":"ArchiCAD (.gsm)"},{"value":"113","label":"CATIA (.CATProduct, .CATMaterial, .CATAnalysis)"},{"value":"114","label":"Octane Render (.orbx)"},{"value":"115","label":"Mudbox (.mud)"},{"value":"116","label":"Adobe Dimension (.asd, .dn)"},{"value":"119","label":"Python Script (.py, .pyc)"},{"value":"120","label":"Maya Mel Script (.mel)"},{"value":"123","label":"Substance Designer (.sbs, .sbsprs, .sbsar)"},{"value":"129","label":"3D Manufacturing File (.3mf)"},{"value":"130","label":"Autodesk Alias (.wire)"},{"value":"131","label":"formZ (.fmz)"},{"value":"133","label":"Strata 3D (.s3d)"},{"value":"134","label":"trueSpace (.cob, .scn, .rsobj, .rsscn)"},{"value":"135","label":"CryEngine (.cga, .cgf, .chr, .skin)"},{"value":"137","label":"Marmoset Toolbag (.tbscene, .tbmat)"},{"value":"139","label":"Alibre/Geomagic (.ad_prt, .ad_asm, .ad_dwg, .ad_smp, .ad_pkg)"},{"value":"140","label":"Marvelous Designer (.zpac, .avt, .pos, .ZPrj)"},{"value":"141","label":"Autodesk Revit (.rfa, .rvt)"},{"value":"144","label":"Biovision Hierarchy (.bvh)"},{"value":"145","label":"Lumion (.ls8)"},{"value":"146","label":"Autodesk Inventor (.idw)"},{"value":"147","label":"3D ACIS (.sat)"},{"value":"149","label":"KeyShot (.bip, .ksp)"},{"value":"183","label":"Clarisse IFX (.project)"},{"value":"184","label":"Mari (.mra)"},{"value":"185","label":"mat (.mat)"},{"value":"187","label":"MCG Tool (.mcg)"},{"value":"188","label":"VRML (.wrl)"},{"value":"189","label":"Ply (.ply)"},{"value":"191","label":"amf (.amf)"},{"value":"192","label":"GrowFX (GrowFX)"},{"value":"196","label":"Lumion (.ls9)"},{"value":"197","label":"VDB (.vdb)"},{"value":"199","label":"Lumion (.ls10)"},{"value":"200","label":"ARTCam (.art)"},{"value":"201","label":"fbm (.fbm)"},{"value":"202","label":"Coordinate 3D (.c3d)"},{"value":"204","label":"3ds Max Render Preset Settings (.rps)"},{"value":"205","label":"Twinmotion (.tm)"},{"value":"206","label":"D5 Render (.drs)"},{"value":"208","label":"Vectorworks (.vwx)"},{"value":"209","label":"Blockbench (.bbmodel)"},{"value":"210","label":"Parasolid (.x_t, .x_b)"},{"value":"211","label":""},{"value":"212","label":"SVG (.svg)"},{"value":"213","label":"Adobe Illustrator (.ai)"},{"value":"214","label":"EPS (.eps)"},{"value":"215","label":"PNG (.png)"},{"value":"216","label":"JPG (.jpg)"},{"value":"217","label":"Adobe Photoshop (.psd)"},{"value":"218","label":"Machine Training Bundle (.mtb)"},{"value":"219","label":"EXR (.exr)"},{"value":"220","label":"G-code (.gcode,, .mpt,, .mpf,, .nc)"},{"value":"221","label":"LYC (.lyc)"},{"value":"222","label":"MP4 (.mp4)"},{"value":"223","label":"Lumion (.ls11)"},{"value":"224","label":"Lychee Slicer Project File (.lys)"},{"value":"225","label":"Chitubox Slicer Project File (.chitubox)"},{"value":"226","label":"Binary G-code (.bgcode)"},{"value":"227","label":"GSplat (.splat)"},{"value":"228","label":"JSON (.json)"},{"value":"229","label":"PyTorch (.pt, .pth)"},{"value":"230","label":"PyTorch Lightning (.ckpt)"},{"value":"231","label":"YAML (.yaml)"}]},"priceRange":{"filters":[{"value":"range_2_10","label":"$2 - $10"},{"value":"range_10_20","label":"$10 - $20"},{"value":"range_20_50","label":"$20 - $50"},{"value":"range_50_100","label":"$50 - $100"},{"value":"more_than_100","label":"$100+"}]},"designers":{"label":"Designer","filters":[]},"licenses":{"label":"Content filters","filters":[{"value":"collections_only","label":"Packs only"},{"value":"exclude_3d_print","label":"Exclude 3D Print"},{"value":"exclude_editorial","label":"Exclude editorial license"},{"value":"has_video","label":"Has video"},{"value":"has_marmoset","label":"Has 3D viewer"},{"value":"include_ai_generated","label":"Include AI generated content"},{"value":"cgt_standard_only","label":"CGT Standard"}]}},"score":[{"id":"5769103","score":372606.88},{"id":"5732885","score":318083.06},{"id":"5804521","score":297890.2},{"id":"5571481","score":251192.55},{"id":"5597880","score":245876.4},{"id":"5806520","score":241783.8},{"id":"5681385","score":219859.25},{"id":"5631339","score":207698.28},{"id":"5605207","score":190.56544},{"id":"5594456","score":177.63353},{"id":"5580341","score":164.42812},{"id":"5601326","score":157.94713},{"id":"5591372","score":151.61063},{"id":"5608906","score":150.63127},{"id":"7073820","score":149.76422},{"id":"5700676","score":149.6219},{"id":"5608265","score":149.2175},{"id":"5584380","score":147.10774},{"id":"7027953","score":146.07988},{"id":"5616629","score":145.52943},{"id":"5008775","score":144.27455},{"id":"5567603","score":141.85066},{"id":"5576999","score":121.94583},{"id":"5707595","score":103.92554},{"id":"5587978","score":101.54056},{"id":"5692670","score":99.434715},{"id":"4996253","score":98.9385},{"id":"5008624","score":98.9262},{"id":"5613131","score":98.31056},{"id":"4996216","score":96.18999},{"id":"5676907","score":94.325745},{"id":"5685422","score":90.88859},{"id":"4997567","score":85.65658},{"id":"5008662","score":83.162254},{"id":"4991851","score":83.06796},{"id":"4998707","score":82.08256},{"id":"5001164","score":82.03935},{"id":"5001115","score":78.39653},{"id":"5001078","score":76.59637},{"id":"5003187","score":74.308784},{"id":"4991838","score":73.735146},{"id":"5008784","score":71.651695},{"id":"4997579","score":70.319984},{"id":"4998665","score":67.08989},{"id":"5044736","score":59.633476},{"id":"4578110","score":51.59395}],"tag_links":{"header":"Check other trending 3D models","links":[{"title":"London 3D models","link":"https://www.cgtrader.com/3d-models/london"},{"title":"Construction 3D models","link":"https://www.cgtrader.com/3d-models/construction"},{"title":"Male Base 3D models","link":"https://www.cgtrader.com/3d-models/male-base"},{"title":"Crown 3D models","link":"https://www.cgtrader.com/3d-models/crown"},{"title":"Chicken 3D models","link":"https://www.cgtrader.com/3d-models/chicken"},{"title":"Calendar 3D models","link":"https://www.cgtrader.com/3d-models/calendar"},{"title":"Vr Headset 3D models","link":"https://www.cgtrader.com/3d-models/vr-headset"},{"title":"Leaf 3D models","link":"https://www.cgtrader.com/3d-models/leaf"},{"title":"Hulk 3D models","link":"https://www.cgtrader.com/3d-models/hulk"},{"title":"Panda 3D models","link":"https://www.cgtrader.com/3d-models/panda"},{"title":"Rock 3D models","link":"https://www.cgtrader.com/3d-models/rock"},{"title":"Mickey Mouse 3D models","link":"https://www.cgtrader.com/3d-models/mickey-mouse"},{"title":"Goat 3D models","link":"https://www.cgtrader.com/3d-models/goat"},{"title":"F1 3D models","link":"https://www.cgtrader.com/3d-models/f1"},{"title":"Scanned 3D models","link":"https://www.cgtrader.com/3d-models/scanned"},{"title":"Gallery 3D models","link":"https://www.cgtrader.com/3d-models/gallery"},{"title":"Reindeer 3D models","link":"https://www.cgtrader.com/3d-models/reindeer"}]},"suggested_search":null,"isSimilarSearchPossible":true,"url":"/3d-models/ammonoids","saveSearchSettings":null,"isSalesBoostEnabled":true,"subscriptionBadgesEnabled":null,"hideSuggestionsSection":null,"is_user_logged_in":false,"should_show_all_items_on_mobile":false,"pageTitle":"Ammonoids 3D Models – Free \u0026 Premium Downloads | CGTrader"}