Sphenacodon ferox sexta_extincion Snout-tail length 275 mm

Snout-tail length 275 mm

making him taller than an average man

Snout-tail length 585mm

Xiphactinus fossils have been found in several parts of the world

Sphenacodon ferox sexta_extincion Snout-tail length 275 mmSphenacodon ferox : A primitive predator on the path of mammals During the Early Permian, some 300 million years ago, terrestrial ecosystems were dominated by a diverse and constantly evolving fauna. Among the most prominent predators of that time was Sphenacodon ferox , a carnivorous synapsid that inhabited the regions that now constitute the southwestern United States. This animal, although extinct for hundreds of millions of years, represents a key