Classification of Morgan and White 1995

G. †Castoroides Foster 1838 [giant beaver]
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Castoroides leiseyorum Morgan and White 1995
Fm. Cricetidae Fischer von Waldheim 1817
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G. †Allophaiomys Kormos 1932
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Allophaiomys guildayi van der Meulen 1978
G. †Pedomys Baird 1858
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Pedomys australis Martin 1995
Pedomys llanensis Hibbard 1944
G. Pitymys McMurtrie 1831
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Pitymys hibbardi Holman 1959
G. Podomys Osgood 1909
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Podomys floridanus Chapman 1889 [Florida mouse]
Podomys oklahomensis Stephens 1960
G. Sigmodon Say and Ord 1825 [cotton rat]
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Sigmodon medius Gidley 1922
G. Hydrochoerus Brisson 1762 [capybara]
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Hydrochoerus holmesi Simpson 1928