Dimetrodon, skull & jaws Compsognathus few intact examples of rhenanids

few intact examples of rhenanids have survived in the fossil record

It was roughly 20 feet (6 m) long and weighed about 3-4 tons

Exactly how it lived and what it ate are still open to speculation

It has been suggested that Spinosaurus ate fish because of it's crocodile-shaped skull

Cones attached to the branch are rare

Dimetrodon, skull & jaws Compsognathus few intact examples of rhenanidsDimetrodon (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