Orbits and foramen magnum unusually large in correlation
with reduced size of animal; squamosal forming posterior
margin of orbit; circumorbital series absent (except for
postorbital); sensory pits on squamosal and frontal.
Characters defining the family are evidently the more specialized
cranial features, which probably evolved during Mississippian and early
Pennsylvanian times.
The definition of the genus and species may be left to rest upon
Peabody's (1958) original description and the present account, until
the discovery of other members of the family gives reason for making
further distinctions.