Classification of Miller, Jr. 1955
Or. Theropoda Marsh 1881 [theropod]
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Fm. †Coeluridae Marsh 1881 [coelurid]
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G. †Dryptosaurus Marsh 1877
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†Dryptosaurus aquilunguis Cope 1866
†Dryptosaurus macropus Cope 1868
Subor. †Ornithopoda Marsh 1881 [ornithopod]
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Fm. †Hadrosauridae Cope 1869 [hadrosaurid]
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G. †Hadrosaurus Leidy 1858
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†Hadrosaurus cavatus Cope 1871
†Hadrosaurus foulkii Leidy 1858
†Hadrosaurus minor Marsh 1870