The steppe bison or steppe wisent (Bison priscus)[1] is an extinct species of bison that was once found on the mammoth steppe where its range included British Isles,[2] Europe,[3] Central Asia,[4] Northern to Northeastern Asia,[5][6][7][8] Beringia, and central North America,[9][10] from northwest Canada to Mexico during the Quaternary. This wide distribution is sometimes called the Pleistocene bison belt compared to the Great bison belt.[11] The radiocarbon dating of a steppe bison skeleton indicates that it was present 5,400 years ago in Alaska.[12] Three chronological subspecies, Bison priscus priscus, Bison priscus mediator, and Bison priscus gigas, have been suggested.[13]