Classification of Rhoads 1903

Or. Cetacea Brisson 1762 [whale]
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Fm. †Squalodontidae Brandt 1873
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G. †Squalodon Grateloup 1840
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†Squalodon atlanticus Leidy 1856
Fm. Platanistidae Gray 1846
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G. †Agabelus Cope 1875
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†Agabelus porcatus Cope 1875
G. †Ixacanthus Cope 1868
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G. †Priscodelphinus Leidy 1851
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Invalid names: Priscodelphinus grandaevus Leidy 1851 [synonym]
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Invalid names: Delphinapterus hawkinsii Cope 1868 [synonym]
G. †Zarhachis Cope 1868
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†Zarhachis velox Cope 1869
Fm. Physeteridae Gray 1821 [sperm whale]
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G. Physeter Linnaeus 1758
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†Physeter vetus Leidy 1869
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Invalid names: Physeter antiquus Leidy 1853 [objective synonym]
Or. Sirenia Illiger 1811 [sirenian]
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Fm. Dugongidae Gray 1821 [dugong]
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G. †Hemicaulodon Cope 1869
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Fm. Trichechidae Gray 1821 [manatee]
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G. Trichechus Linnaeus 1758 [manatee]