Stratigraphic chart of the lower Permian (partial)
Content updated October 16, 2005
RICHARDS SPUR UNIDENTIFIED
CASEASAUR
Synapsida-Caseasauria
Above, picture of a premaxilla that could belong to the same caseasaur on the basis of the same dentition. From Richards Spur (Fort Sill, Dolese Q.) - Comanche Co. Oklahoma. Lower Permian.