Dimetrodon, track Iguanodon in the marine deposits of

in the marine deposits of the Edwardsville Formation

with strong recurved claws seem to have been adapted for perching

T-rex was up to 18

Faunas of West Virginia in the Pleistocene (Ice Age)

Chasmosaur humerus

Dimetrodon, track Iguanodon in the marine deposits ofDimetrodon track Dimetrodon (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