Mammalia - Carnivora - Canidae

Alternative combinations: Hesperocyon leptodus, Nothocyon leptodus

Belongs to Archaeocyon according to X. Wang et al. 1999

Sister taxa: Archaeocyon falkenbachi, Archaeocyon pavidus

Type specimen: Its type locality is North Platte River, which is in an Arikareean terrestrial horizon in the "Lower Harrison" Formation of Wyoming

Average measurements (in mm): P4 8.42 x 4.09, M1 6.71 x 8.25, M2 4.09 x 6.44, p4 5.97 x 2.58, m1 9.34 x 3.85, m2 5.30 x 3.33