Classification of Hibbard 1941
G. Perognathus Maximillian 1839 [pocket mouse]
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†Perognathus pearlettensis Hibbard 1941
G. Reithrodontomys Giglioli 1874 [harvest mouse]
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†Reithrodontomys pratincola Hibbard 1941
G. †Citellus Oken 1816
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†Citellus cragini Hibbard 1941
†Citellus meadensis Hibbard 1941