skeleton of eryops. early permian from texas. eryops meaning drawn-out face because most of its skull was in front of its eyes is a genus of extinct, semi-aquatic amphibian found primarily in the lower permian-aged admiral formation (about 295 million years ago) of archer county, texas. eryops averaged a little over 1.5-2.0 meters (5-6 ft) long, making it one of the largest land animals of its time. it weighed about 90 kilograms (200 lb). eryops is an example of an animal that made successful ad