Stratigraphic chart of the lower Permian (partial)
Content updated October 16, 2005
ERYOPS
Temnospondyli-Eryopoidea-Eryopidae
Above: pictures of the Eryops partial snout in ventral and dorsal view. From Ryan Sandstones, Wellington Formation, near Waurika. Jefferson Co. Oklahoma. Lower Permian.
Abbreviations: m, maxilla; mt, marginal teeth; pm, premaxilla; v, vomer; vt, vomerine tusks