Classification of Matthew 1904
Fm. Cervidae Gray 1821 [deer]
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Subfm. †Palaeomerycinae Lydekker 1883
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G. †Palaeomeryx von Meyer 1834
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†Palaeomeryx americanus Douglass 1899
†Palaeomeryx antilopinus Scott 1893
†Palaeomeryx borealis Cope 1877
†Palaeomeryx kaupi von Meyer 1834
†Palaeomeryx madisonius Douglass 1899
Fm. Antilocapridae Gray 1866 [pronghorn]
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Fm. †Merycodontidae Matthew 1904
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G. †Merycodus Leidy 1854
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†Merycodus furcatus Leidy 1869
†Merycodus osborni Matthew 1904
†Merycodus ramosus Cope 1874
Invalid names: Cosoryx Leidy 1869 [synonym], Merycodus agilis Douglass 1899 [nomen dubium]