Full reference: R. A. Kissel, D. W. Dilkes, and R. R. Reisz. 2002. Captorhinus magnus, a new captorhinid (Amniota: Eureptilia) from the Lower Permian of Oklahoma, with new evidence on the homology of the astragalus. Canadian Journal of Earth Sciences 39(9):1363-1372
Type specimen: OMNH 55387, a limb element (complete right femur). Its type locality is Richards Spur, which is in a Leonard fissure fill claystone/conglomerate in the Garber Formation of Oklahoma.
Ecology: ground dwelling insectivore-herbivore