Classification of Simpson 1930

Auchenia minor Leidy 1886
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Hippotherium princeps Leidy 1890
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G. †Leptarctus Leidy 1856
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Leptarctus progressus Simpson 1930
G. †Amphicyon Lartet 1836
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Amphicyon pontoni Simpson 1930
G. †Neochoerus Hay 1926
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G. †Perchoerus Leidy 1869
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Perchoerus antiquus Marsh 1870
G. †Megatylopus Matthew and Cook 1909
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Megatylopus major Leidy 1886
G. †Procamelus Leidy 1858
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Procamelus minimus Leidy 1886
G. †Hipparion de Christol 1832
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Hipparion ingenuum Leidy 1885
Hipparion phosphorum Simpson 1930
Hipparion plicatile Leidy 1887
G. †Merychippus Leidy 1856
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Merychippus gunteri Simpson 1930
Merychippus secundus Osborn 1918
Merychippus westoni Simpson 1930
G. †Aphelops Owen 1845
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Aphelops longipes Leidy 1890
G. †Diceratherium Marsh 1875
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G. †Teleoceras Hatcher 1894
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Teleoceras proterus Leidy 1885
G. †Pliomastodon Osborn 1926
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Pliomastodon sellardsi Simpson 1930
Amphicyon sinapius Matthew 1902
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Invalid names: Amphicyon amnicola Matthew and Cook 1909 [synonym]
G. †Serridentinus Osborn 1923
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G. †Tanupolama Stock 1928
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