Stratigraphic chart of the lower Permian (partial)
Content updated October 16, 2005
RICHARDS SPUR UNIDENTIFIED SKULL References
Chronological
J.R.Bolt (1980) "New tetrapods with bicuspid teeth from the Fort Sill Locality (Lower Permian, Oklahoma)" Neues Jahrbuch fur Geologie und Palaontologie, Monatshefte, 8: 449 - 459.
M. DeBraga., R.R. Reisz (1996) "The early permian reptile Aleistorhinus Pteroticus and its phylogenetic position" Journal of Vertebrate Paleontology 16 (3): 384 - 395
V.V. Bulanov (2002) "New data on Procolophons from the Permian of Eastern Europe" Paleontological Journal, Vol. 36, No. 5: 525 - 530.
J.S. Anderson, R.R. Reisz (2003) "A new microsaur (Tetrapoda: Lepospondyli) from the lower Permian of Richards Spur (Fort Sill) Oklahoma" Canadian Journal of Earth Sciences 40: 499 - 505
