 Steen (1934)'s original species name Asaphestera platyris was retained for a skull which has been re-evlatuated as the earliest known synapsid.The type species of "Asaphestera" is "Asaphestera platyris", named by Steen (1934) based on three skulls.Carroll & Gaskill (1978) noted that one of the skulls was briefly named as the species ""Hylerpeton" intermedium" by Dawson (1894), though it is no longer consider related to the genus "Hylerpeton".