Classification of Baird and Horner 1979
G. †Coelosaurus Owen 1854
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Cl. Mammalia Linnaeus 1758 [mammal]
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Or. Cetacea Brisson 1762 [whale]
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Subor. Mysticeti Cope 1891
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Fm. Balaenopteridae Gray 1864 [rorqual]
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Invalid names: Hadrosaurus tripos Cope 1869 [nomen dubium]
Fm. Crocodylidae Cuvier 1807 [crocodile]
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G. †Deinosuchus Holland 1909
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†Deinosuchus rugosus Emmons 1858
Invalid names: Pliogonodon priscus Leidy 1856 [nomen dubium], Polydectes Cope 1869 [synonym]
Or. Saurischia Seeley 1888 [saurischian]
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Subor. †Sauropodomorpha Huene 1932 [sauropodomorph]
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Infraor. †Sauropoda Marsh 1878 [sauropod]
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G. †Hypsibema Cope 1869
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†Hypsibema crassicauda Cope 1869
†Hypsibema missouriense Gilmore and Stewart 1945
Invalid names: Neosaurus Gilmore and Stewart 1945 [synonym], Parrosaurus Gilmore 1945 [objective synonym]
Subor. Theropoda Marsh 1881 [theropod]
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Infraor. †Carnosauria Huene 1920 [carnosaur]
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Fm. †Tyrannosauridae Osborn 1906 [tyrannosaurid]
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G. †Albertosaurus Osborn 1905 [Alberta lizard]
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†Albertosaurus libratus Lambe 1914
†Albertosaurus sarcophagus Osborn 1905
Infraor. Coelurosauria Huene 1914 [coelurosaur]
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Fm. †Ornithomimidae Marsh 1890 [ornithomimid]
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Or. †Ornithischia Seeley 1888 [ornithischian]
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Subor. †Ornithopoda Marsh 1881 [ornithopod]
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G. †Kritosaurus Brown 1910
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†Kritosaurus incurvimanus Parks 1919
†Kritosaurus notabilis Lambe 1914