Dimetrodon, skull & jaws Tyrannosaurus Rex the United States

the United States

finding the species Allognathosuchus haupti and A

Family: Crocodylidae

It also would have made it difficult for predators to swallow

This skeleton proved to be one of the most complete juvenile Tyrannosaurus rex skeletons yet found

Dimetrodon, skull & jaws Tyrannosaurus Rex the United StatesDimetrodon (meaning two measure teeth) was a sail backed, meat eating animal that lived during the Permian Period, roughly 280 MYA years ago, before the dinosaurs evolved. It was a so called mammal like reptile, a pelycosaur; pelycosaurs were the ancestors of the mammals. Dimetrodon was a dominant carnivore during the Permian period, living mainly in swampy areas. Unlike their fellow non finned pelycosaurs, they warmed up early after sunrise, and