with its cranial horns and armored tail

pero también presentaba ciertas características craneales más similares a los terópodos más primitivos

Sphenacodon ferox featured only a low crest

Length 562 mm

Inostrancevia alexandri Scale:1:35 with its cranial horns andInostrancevia alexandri, an extinct species of gorgonopsid therapsid that inhabited Earth during the Permian period, approximately 270 to 260 million years ago. It was a large predator that ranked high in the food chain of its ecosystem. This therapsid belonged to the group of gorgonopsids, a family of carnivores that were characterized by their developed fangs and their appearance similar to that of reptiles, although they were more closely related