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 Introduction

LEPOSPONDYLI

EUREPTILIA

SYNAPSIDA

PARAREPTILIA

DIADECTOMORPHA

ANTHRACOSAUROIDEA

TEMNOSPONDYLI

UNIDENTIFIED TETRAPODS

Stratigraphic chart of the lower Permian (partial)

Phylogenetic Relationships

Content updated October 16, 2005

 RICHARDS SPUR UNIDENTIFIED

CASEASAUR

 Synapsida-Caseasauria

Above, picture , in medial view, of a partial  premaxilla of the unidentified caseasaur, one of the teeth shows the multicuspid morphology on the tip. From Richards Spur (Fort Sill, Dolese Q.) - Comanche Co. Oklahoma. Lower Permian.