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Eryops (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 was a fierce predator on land and in the water; it may have eaten mostly fish, small reptiles and amphibians. It may have been preyed upon by Dimetrodon, which was a faster moving animal. Eryops may have been slow moving on land. Eryops was named by E. D. Cope in 1887.

This specimen is from the Wichita Basin, Texas. Lower Permian, (270 million years)