Dimetrodon - Schleich
Dimetrodon became extinct some 40 million years before the first appearance of dinosaurs. It is more closely related to mammals than to modern reptiles. The defining feature of Dimetrodon is the large sail on its back formed by elongated spines extending from the Vertebrae. It walked on four legs and had a tall, curved skull with large teeth of different sizes set along the jaws.
Permian Period - before there were dinosaurs!