Eryops megacelphalus, amphibian Pteranodon The front and back of

The front and back of the tooth is shown in the photos

and is a direct ancestor of the living American bison

Ctenochasma is distinguished by its mouth which contained as many as 260 long

Hell Creek Formation

Eryops megacelphalus, amphibian Pteranodon The front and back ofEryops (pronounced EAR ee ops) (meaning "long eye" or "drawn out eye" in Greek) was a common, primitive labyrinthodontid amphibian that lived in Permian period swamps. This meat eater had a stout body with very wide ribs, a strong spine, four short, strong legs, a short tail, and a wide, elongated skull with many sharp teeth. Its teeth had enamel with a folded pattern. Eryops was about 5 feet long, one of the largest land animals of its time. Eryops