Musk Ox Fossils
Two species of musk ox lived in Ohio during the Ice Age, although fossils of either species are uncommon. Bootherium bombifrons is an extinct species. Ovibos moschatus still survives in northern climates.
- Hansen, M. C., 1996. "Phylum Chordata--Vertebrate Fossils," in Fossils of Ohio, edited by R. M. Feldmann and Merrianne Hackathorn. Ohio Division of Geological Survey Bulletin 70, p. 288-369.