Two measures of teeth
Permian (275 million years ago)
Texas, Oklahoma, Germany
15 - 16 ft long, 5 ft tall
550 - 660 lbs
Often mistaken as one of the sail backed dinosaurs. However, its bent limbs indicate it was not closely related to dinosaurs. Reptiles stand like Dimetrodon, however Dimetrodon is actually an ancestor of mammals. Dimetrodon was a meat eater. Its sail was long thought to be a way to heat the animal in the sun. But it is more likely it was a display feature to attract mates...