Stratigraphic chart of the lower Permian (partial)
Content updated October 16, 2005
RICHARDS SPUR DIAPSID ARAEOSCELID?
Eureptilia-Diapsida-Araeoscelidae
Above: pictures of a possible Diapsid (Araeoscelid?) vertebra in posterior, lateral, dorsal and frontal view, the vertebra shows the presence of mammillary processes (mp) on the neural spine. From Richards Spur (Dolese Quarry), Comanche Co. Oklahoma. Lower Permian.
Abbreviations: mp, mammillary process;