Placerias was a robust, barrel-chested herbivore that thrived during the Late Triassic period, around 221 to 210 million years ago. As a member of the dicynodonts, it was more closely related to mammals than to dinosaurs. Weighing up to a ton and measuring about 10 feet long, Placerias had a beak-like mouth with two large tusks, which may have been used for defense or in dominance battles. Its sturdy, sprawling limbs allowed it to navigate floodplains and lake shores, where it fed on ferns and other vegetation. Despite its size, Placerias had to compete with and evade early archosaurian predators such as Postosuchus. This prehistoric tank-like creature represents one of the last great dicynodonts before the rise of true dinosaurs.