Dilophosaurus was a theropod dinosaur that lived during the Early Jurassic period, around 193 million years ago. Measuring up to 7 meters (23 feet) in length and weighing around 400 kilograms (880 pounds), it was characterized by two distinctive crests on its head. These crests were likely used for display or species recognition. Dilophosaurus had a slender build, long legs for swift movement, and sharp teeth, indicating it was a carnivorous predator. Its fossils, primarily found in North America, provide valuable insights into the diversity of early theropods.