Tremarctos Gervais, 1855 . Hist. Nat. Mammifères, 2:20.

TYPE SPECIES: Ursus ornatus F. G. Cuvier, 1825 .

COMMENTS: Thenius (1976) argued that differences between Tremarctos and other bears warranted separation at the subfamily level, however, Kurtén (1966) and Hendey (1980a) supported its inclusion here.