Classification of Emslie and Czaplewski 1985

G. †Arctodus Leidy 1854
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†Arctodus simus Cope 1879 [giant short-faced bear]
G. Ursus Linnaeus 1758
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Ursus americanus Pallas 1780 [black bear]
Ursus arctos Linnaeus 1758 [brown bear]
G. Ovis Linnaeus 1758 [sheep]
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Ovis canadensis Shaw 1804 [bighorn sheep]