Mammalia - Perissodactyla - Palaeotheriidae

Alternative combinations: Orohippus major, Pliolophus major

Belongs to Hyracotherium according to R. K. Stucky 1984

Sister taxa: Hyracotherium cristatum, Hyracotherium montanum, Hyracotherium pernix, Hyracotherium seekinsi, Hyracotherium vasacciense

Type specimen: Its type locality is Millersville, which is in a Bridgerian terrestrial horizon in the Bridger Formation of Wyoming

Ecology: ground dwelling frugivore-folivore

Average measurements (in mm): m1 9.50 x 6.80