Stratigraphic chart of the lower Permian (partial)
Content updated October 16, 2005
THRAUSMOSAURUS SERRATIDENS
Synapsida-Incertae Sedis
Above: pictures , lateral, medial, posterior, and anterior views, of a tetrapod maxilla fragment that could be tentatively assigned to Thrausmosaurus on the basis of presence of curvature of the teeth only in the distal third of the tooth, and on the presence of serration extending, only posteriorly, till the base of the tooth. From Richards Spur (Dolese Quarry), Comanche Co. - Oklahoma. Lower Permian