This mentioned taxonomy is an attempt to make an conclusive assignment from the different classifications of various scientists. Because the taxonomy may change due to the latest investigative methods and other findings, our map is a guide only.
D. Pagnac, 2006 - Scaphohippus, a new genus of horse (Mammalia: Equidae) from the Barstow Formation of California - Journal of Mammalian Evolution (13), 37-61 (journal article, English)
B. J. MacFadden, 1998 - Equidae - Evolution of Tertiary Mammals of North America (1), 537-559 (book/book chapter, English)
H. F. Osborn, 1918 - Equidae of the Oligocene, Miocene, and Pliocene of North America, iconographic type revision - Memoirs of the American Museum of Natural History (2), 1-217 (journal article, English)
J. C. Merriam, 1915 - New Horses From the Miocene and Pliocene of California - University of California Publications, Bulletin of the Department of Geology (9), 49-58 (journal article, English)