R. D. Guthrie, from p. 3 of "Bison evolution and zoogeography in North America during the Pleistocene," Q Rev Biol 45:1-15, 1970:
During the early history of Pleistocene paleontology in America it was not uncommon to give any horn core the status of a new species if it was slightly different from any other type that had been described; consequently the literature abounds with forms such as Bison regius, B. angularis, B. oliverhayi, B. rotundus, B. californicus, B. ferox, B. texanus, B. taylori, B. pacificus, B. sylvestris, and B. kansensis, which have since been lost in the sea of synonymy.
