Classification of Matthew 1924
Fm. Mustelidae Fischer 1817 [mustelid carnivore]
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G. †Brachypsalis Cope 1890
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†Brachypsalis matutinus Matthew 1924
†Brachypsalis pristinus Matthew and Gidley 1904
Fm. Canidae Fischer de Waldheim 1817 [canid]
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G. †Nothocyon Wortman and Matthew 1899
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†Nothocyon temnodon Wortman and Matthew 1899
G. †Tomarctus Cope 1873
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†Tomarctus confertus Matthew 1918
†Tomarctus kelloggi Merriam 1911
†Tomarctus optatus Matthew 1924
†Tomarctus temerarius Leidy 1858
Invalid names: Tephrocyon Merriam 1906 [synonym]
G. †Amphicyon Lartet 1836
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†Amphicyon frendens Matthew 1924
†Amphicyon idoneus Matthew 1924
†Amphicyon ingens Matthew 1924
G. †Pliocyon Matthew 1918
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†Pliocyon gidleyi Matthew 1902
†Pliocyon meandrinus Hatcher 1894
G. †Mylagaulus Cope 1878
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†Mylagaulus angulatus Sinclair 1903
†Mylagaulus novellus Matthew 1924
†Mylagaulus vetus Matthew 1924
Invalid names: Mylagaulodon Sinclair 1903 [synonym]
Fm. Heteromyidae Gray 1868
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Fm. Cricetidae Fischer von Waldheim 1817
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G. †Archaeolagus Dice 1917
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†Archaeolagus macrocephalus Matthew 1907
†Archaeolagus primigenius Matthew 1907
G. †Prosthennops Matthew and Gidley 1904
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†Prosthennops condoni Marsh 1871
†Prosthennops rex Marsh 1894
†Prosthennops ziegleri Marsh 1871
G. †Protolabis Cope 1876
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†Protolabis fissidens Cope 1876
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Invalid names: Protolabis princetonianus Sinclair 1915 [synonym]
†Protolabis heterodontus Cope 1874
†Protolabis saxeus Matthew 1924
G. †Blastomeryx Cope 1877
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†Blastomeryx gemmifer Cope 1874
†Blastomeryx medius Matthew 1924
†Blastomeryx riparius Matthew 1924
†Blastomeryx scotti Matthew 1924
†Blastomeryx sinclairi Matthew 1918
G. †Hipparion de Christol 1832
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†Hipparion lenticulare Cope 1893
†Hipparion occidentale Leidy 1856
†Hipparion plicatile Leidy 1887
†Hipparion sinclairi Wortman 1882
†Hipparion venustum Leidy 1853
G. †Merychippus Leidy 1856
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†Merychippus isonesus Cope 1889
†Merychippus primus Osborn 1918
†Merychippus sejunctus Cope 1874
†Merychippus seversus Cope 1878
Invalid names: Stylonus Cope 1878 [synonym]
†Amphicyon sinapius Matthew 1902
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Invalid names: Amphicyon amnicola Matthew and Cook 1909 [synonym]
†Machairodus catocopis Cope 1887
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Invalid names: Machairodus coloradensis Cook 1922 [synonym]
G. †Metoreodon Matthew and Cook 1909
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†Metoreodon californicus Merriam 1919
†Metoreodon major Leidy 1858
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Invalid names: Merychyus profectus Matthew and Cook 1909 [synonym]
†Tomarctus brevirostris Cope 1873
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Invalid names: Tephrocyon hippophagus Matthew and Cook 1909 [synonym]