Classification of Olson 1940
G. Canis Linnaeus 1758 [canine]
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†Canis ayersi Sellards 1916 [dire wolf]
†Canis dirus Leidy 1858 [dire wolf]
G. Sylvilagus Gray 1867 [cottontail rabbit]
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Subg. Sylvilagus (Limnolagus) Mearns 1897
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Sylvilagus (Limnolagus) aquaticus Bachman 1837 [swamp rabbit]
Fm. Camelidae Gray 1821 [camel]
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Fm. Tapiridae Gray 1821 [tapir]
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G. Tapirella Palmer 1903
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Tapirella bairdi Gill 1865 [Baird's tapir]
Invalid names: Elasmognathus Gill 1865 [replaced]
Invalid names: Tapirus haysii Leidy 1860 [nomen dubium]
G. †Megalonyx Harlan 1825
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†Megalonyx jeffersoni Desmarest 1822 [Jefferson's ground sloth]