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.