Eryops ( drawn-out face ) was a common, primitive amphibian that lived in swamps during the Permian period. 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 in strong jaws. Its teeth had enamel with a folded pattern. Eryops was about 5 feet long, one of the largest land animals of its time. Eryops is an example of an animal that made successful adaptations in the movement from a water environment to a terrestrial one.