Data from: A new small captorhinid reptile from the lower Permian of Oklahoma and resource partitioning among small captorhinids in the Richards Spur fauna

Two partial reptile skulls and six dentigerous fragments from the lower
Permian Richards Spur locality of Oklahoma represent a new genus and
species of small captorhinid reptile. Labidosauriscus richardi gen. et sp.
nov. is distinguished from other captorhinids in the reduction of the
height of the ridges forming the characteristic net-like, ridge-and-pit
cranial sculpturing of captorhinids, and the superimposition of a system
of finer pits and furrows over the primary ridge-and-pit cranial
ornamentation. Labidosauriscus richardi shares with C. laticeps a
post-caniniform tooth morphology characterized by convex mesial and distal
carinae that form a distinctly asymmetrical apex in labial aspect. The
description of L. richardi brings to six the number of captorhinid species
known from the productive Richards Spur fissure-fill locality. Each of
these species exhibits a distinctive post-caniniform tooth morphology (or
multiplication of these teeth), which is consonant with the hypothesis of
resource partitioning among the small faunivorous and omnivorous
captorhinids at Richards Spur. As an ‘exhumed early Permian hill,’
Richards Spur provides a unique window into early reptile diversification
in a distinctive upland environment that is rarely preserved in the
tetrapod fossil record.