Dimetrodon

Dimetrodon was not a dinosaur, but a pelycosaur, a so-called mammal-like reptile. The pelycosaurs led to the mammals; they are more closely related to us than to the dinosaurs. Dimetrodon had sharp teeth and clawed feet and a sail-like flap of skin along its back. Dimetrodon was a Meat Eater, was 3.5 metres long and lived 280-245 million years ago.