Mammalia - Rodentia

Full reference: R. W. Wilson. 1940. Two new Eocene rodents from California. Carnegie Institution of Washington Publication 514(6):85-95

Belongs to Griphomys according to R. W. Wilson 1940

Sister taxon: Griphomys toltecus

Type specimen: Its type locality is Brea Canyon (Bed CS2), which is in an Uintan terrestrial horizon in the Sespe Formation of California

Ecology: ground dwelling herbivore

Average measurements (in mm): P4 1.22 x 1.21, M1 1.24 x 1.30, M2 1.18 x 1.32, p4 1.07 x 0.94, m1 1.17 x 1.08, m2 1.21 x 1.50