Captorhinus aguti (Cope 1882) Artinskian, Early Permian, ~280 mya, ~40 cm in length, was derived from a sister to Eocaptorhinus and was a sister to Labidosaurus.

Distinct from Eocaptorhinus, the skull of Captorhinus had multiple tooth rows. The nasals expanded laterally. The quadratojugals were not reduced to thin strips. The mandible was ventrall convex overall. The ventral naris was bordered chiefly by the maxilla.

The metacarpals were longer and the fingers more gracile. Metacarpals I-III aligned.

The metatarsals were also longer and the toes more gracile. Metatarsals I-III aligned.

Labidosauriscus richardi (Modesto 2018; Early Permian) similar to Captorhinus in most regards.

Cope ED 1882. Third contribution to the history of the Vertebrata of the Permian formation of Texas. Proceedings of the American Philosophical Society 20:447-461.

Modesto SP; Scott D; Reisz RR 2018. A new small captorhinid reptile from the lower Permian of Oklahoma and resource partitioning among small captorhinids in the Richards Spur fauna. Papers in Palaeontology. Online edition. doi:10.1002/spp2.1109.

wiki/Captorhinus
wiki/Labidosauriscus