Classification of Lambe 1908
Cl. Reptilia Laurenti 1768 [reptile]
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Or. Chelonia Latreille 1800 [turtle]
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Or. Crocodilia Owen 1842 [crocodilian]
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Cl. Mammalia Linnaeus 1758 [mammal]
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Or. Carnivora Bowdich 1821 [carnivoran]
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Subor. †Creodonta Cope 1875 [creodont]
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Fm. †Hyaenodontidae Leidy 1869
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G. †Hyaenodon Laizer and Parieu 1838
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†Hyaenodon crucians Leidy 1853
†Hyaenodon cruentus Leidy 1853
Or. Marsupialia Illiger 1811 [marsupial]
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Or. Rodentia Bowdich 1821 [rodent]
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Subor. Simplicidentata Flower 1883
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Fm. Castoridae Gray 1821 [beaver]
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Fm. Sciuridae Gray 1821 [squirrel]
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Or. Ungulata Linnaeus 1766
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Subor. Artiodactyla Owen 1848 [even-toed ungulate]
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Fm. †Agriochoeridae Leidy 1869 [agriochoerid]
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Fm. †Anthracotheriidae Leidy 1869 [anthracothere]
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Fm. Tragulidae Milnes-Edwards 1864 [chevrotain]
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G. †Leptomeryx Leidy 1853
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†Leptomeryx esulcatus Cope 1889
†Leptomeryx mammifer Cope 1885
†Leptomeryx semicinctus Cope 1889
†Leptomeryx speciosus Lambe 1908
Subor. Perissodactyla Owen 1848 [odd-toed ungulate]
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Fm. Equidae Gray 1821 [horse]
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G. †Mesohippus Marsh 1875
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†Mesohippus assiniboiensis Lambe 1905
†Mesohippus brachystylus Osborn 1904
†Mesohippus planidens Lambe 1905
†Mesohippus praecocidens Lambe 1905
†Mesohippus propinquus Lambe 1905
†Mesohippus stenolophus Lambe 1905
†Mesohippus westoni Cope 1889
Fm. †Hyracodontidae Cope 1879
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Fm. Rhinocerotidae Gray 1821 [rhinoceros]
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G. †Aceratherium Kaup 1834
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†Aceratherium exiguum Lambe 1908
†Aceratherium mite Cope 1875
†Aceratherium occidentale Leidy 1850
Invalid names: Titanotheriidae [empty]
Cl. Pisces Linnaeus 1758
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Or. Actinopterygii Cope 1887 [ray-finned fish]
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Subor. †Aetheospondyli Woodward 1895
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Invalid names: Protospondyli Woodward 1895 [empty]