After McDonald & Ray, 1989
Bootherium Bos Ovibos Bison Symbos Scaphoceros Gidleya Bootherium bombifrons Bootherium [female] †Bos bombifrons †Ovibos bombifrons †Bison appalachicolus †Bootherium sargenti †Bootherium nivicolens †Bootherium brazosis †Symbos [male] †Ovibos cavifrons †Bootherium cavifrons †Symbos australis †Ovibos convexifrons †Scaphoceros tyrrelli †Symbos promptus †Ovibos giganteus †Gidleya zuniensis
Reference(s):
- McDonald, J. N. & Ray, C. E., 1989: The autochthonous North American musk oxen Bootherium, Symbos & Gidleya (Mammalia: Artiodactyla: Bovidae).
–Smithsonian Contributions to Paleobiology: No. 66, pp. iv-77 - McKenna, M. C. & Bell, S. K., eds., 1997: Classification of mammals; above the species level.
–Columbia University Press, New York, 1997.