After Wang, Tedford & Taylor, 1999

Tomarctus Cope, 1873

        †Tomarctus hippophaga (Matthew and Cook, 1909)
            †Tephrocyon hippophagus Matthew & Cook, 1909
            †Tephrocyon hippophagus Matthew & Cook; Cook, 1912
            †Tephrocyon hippophagus Matthew & Cook; Merriam, 1913
            †Tephrocyon hippophagus Matthew & Cook; Sinclair, 1915
            †Tephrocyon hippophagus Matthew & Cook; Matthew, 1918
            †Tephrocyon hippophagus Matthew & Cook; Munthe, 1998
            †Tomarctus brevirostris Cope, 1873; Matthew, 1924 (in partim)
            †Tomarctus brevirostris Cope; Colbert, 1939
            †Tomarctus brevirostris Cope; Hough, 1948 (AMNH 18243, mislabeled by Hough as AMNH 18234)
            †Tomarctus hippophagus (Matthew & Cook); Van der Hoof, 1931
            †Tomarctus hippophagus (Matthew & Cook); Wang, Tedford & Taylor, 1999

        †Tomarctus brevirostris Cope, 1873
            †Tomarctus brevirostris Cope, 1873
            †Tomarctus brevirostris Cope; Matthew, 1899
            †Tomarctus brevirostris Cope; Matthew, 1901
            †Tomarctus brevirostris Cope; Hay, 1902
            †Tomarctus brevirostris Cope; Cope & Matthew, 1915
            †Tomarctus brevirostris Cope; Matthew, 1924 (in partim)
            †Aelurodon francisi Hay, 1924
            †Aelurodon simulans Hay, 1924
            ?†Aelurodon francisi Hay;: Van der Hoof & Gregory, 1940
            †Aelurodon francisi Hay; Wilson, 1960 (in partim)
            †Tomarctus sp.; Repenning & Vedder, 1961
            †Tomarctus brevirostris Cope; Munthe, 1998
            †Aelurodon francisi Hay; Munthe, 1998
            †Tomarctus brevirostris Cope; Wang, Tedford & Taylor, 1999

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