Stratigraphic chart of the lower Permian (partial)
Content updated October 16, 2005
RICHARDS SPUR UNIDENTIFIED
SPHENACODONTID
Synapsida-Eupelycosauria-Sphenacodontidae
Above: pictures of lateral, medial, and anterior views, of an unidentified tooth that could belong to a sphenacodontid on the basis of well developed serrations on posterior and anterior cutting edges, and on the cross-sectional shape that is square, particularly near the base of the same tooth. From Richards Spur (Dolese Quarry) - Comanche Co. Oklahoma. Lower Permian.