Mammalia - Carnivora - Canidae

Alternative combinations: Hesperocyon gregorii, Nothocyon gregorii

Full reference: W. D. Matthew. 1907. Bulletin of the American Museum of Natural History 23(9)

Belongs to Leptocyon according to X. Wang and R. H. Tedford 1992

Sister taxa: Leptocyon vafer, Leptocyon vulpinus

Type specimen: Its type locality is AMNH Rosebud 19, which is in a Harrisonian terrestrial horizon in the Harrison Formation of South Dakota

Ecology: ground dwelling carnivore-omnivore