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	Cephalerpeton ventriarmatum Cephalerpeton ventriarmatum (after Carroll and Baired 1972.)
	Cephalerpeton ventriarmatum was early reptile (eureptile) from the Late Westphalian phase of the Pennsylvanian period (307-305 mya), also called the Late Carboniferous. A partial skeleton was first discovered in the Mazon Creek site in Illinois, from the Francis Creek Shale Member of the Carbondale Formation, and identified by R. L. Moodie in 1912 as an amphibamid amphibian. The Cephalerpeton genus fossil was reclassified as a reptile by Carroll and Baird in 1972 and grouped in the Protorothyrididae Famly. The holotype YPM 796 of C. ventriarmatum is in the Yale Peabody Museum.                                                                References:  Moodie, R. L. 1912. "The Pennsylvanic Amphibia of the Mazon Creek, Illinois, Shales". Kansas University Science Bulletin. 6 (2): 232–259.  Carroll, Robert L.and Donald Baird 1972. "Carboniferous Stem-Reptiles of the Family Romeriidae". Bulletin of the Museum of Comparative Zoology. 143 (5): 321–363.   .
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