Stratigraphic chart of the lower Permian (partial)
Content updated October 16, 2005
RICHARDS SPUR UNIDENTIFIED
CASEASAUR
Synapsida-Caseasauria
Above, picture , in posterior view, of the same partial premaxilla of the unidentified caseasaur. From Richards Spur (Fort Sill, Dolese Q.) - Comanche Co. Oklahoma. Lower Permian.