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Stratigraphic chart of the lower Permian (partial) Content updated October 16, 2005
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RICHARDS SPUR UNIDENTIFIED PELYCOSAUR
Below, pictures in lateral, anterior, and ventral views, of an unidentified tetrapod that could be assigned to pelycosaurs on the basis of deeply excavated base of neural spine, strongly medially tilted zygapophyses, and sharp edged keel on the ventral surface of the centrum. it seems a sphenacodontid vertebra except for the fact that the zygapophyses extend greatly laterally beyond the centrum margin. From Richards Spur (Dolese Quarry)- Comanche Co. Oklahoma. Lower Permian. 1) Unidentified pelycosaur: vertebra in lateral view 2) Unidentified pelycosaur: the same vertebra in anterior view 3) Unidentified pelycosaur: the same vertebra in ventral view |