Stratigraphic chart of the lower Permian (partial)
Content updated October 16, 2005
SULLIVAN ET AL. RICHARDS SPUR
NEW DISSOROPHOID
Temnospondyli-Dissorophoidea
Above: pictures in ventral and lateral view of the palatine bone with LEP (laterally exposed process of the palatine) showing the groove for articulation with the dorsal edge of maxilla (mg). From Richards Spur (Dolese Quarry), Comanche Co. Oklahoma. Lower Permian.
Abbreviaions: mg, groove for the articulation with the dorsal edge of maxilla; rp, replacement pit; t, tusk; vp, vomerine process.