Dimetrodon Pérmico which ranged from Alaska to

which ranged from Alaska to northern Mexico

rex used its huge head and neck to grab and crush the Edmontosaurus

such as lizards

Its hind legs were long and strong

The horns and crest probably had functions in communication between individuals of the same species and in competition for the attention of potential mates

Dimetrodon Pérmico which ranged from Alaska toDimetrodon, (D. grandis, `Wedge toothed), is an extinct genus of non mammalian synapsids that lived during the Lower Permian Kungurian Age, between 295 and 272 million years ago, was a terrestrial animal and is believed to have inhabited in swampy areas and riverbanks, near bodies of fresh water where it could find food. It is a member of the Sphenacodontidae family and is the best known of the Pelycosaurs, especially for its spectacular sail. It