Classification of Prieto-Márquez et al. 2006
G. †Hadrosaurus Leidy 1858
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G. †Ornithotarsus Cope 1869
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†Ornithotarsus immanis Cope 1869
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Fm. Balaenopteridae Gray 1864 [rorqual]
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Invalid names: Hadrosaurus tripos Cope 1869 [nomen dubium]
Superfm. †Hadrosauroidea Huene 1954
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Fm. †Hadrosauridae Cope 1869 [hadrosaurid]
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Subfm. †Hadrosaurinae Lambe 1918 [hadrosaurine]
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Invalid names: Hadrosaurus foulkii Leidy 1858 [nomen dubium]
Subfm. †Lambeosaurinae Parks 1923 [lambeosaurine]
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Invalid names: Hadrosaurus paucidens Marsh 1889 [nomen dubium]
Invalid names: Hadrosaurus breviceps Marsh 1889 [nomen dubium], Hadrosaurus cavatus Cope 1871 [nomen dubium], Hadrosaurus minor Marsh 1870 [nomen dubium]
G. †Gryposaurus Lambe 1914
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†Gryposaurus incurvimanus Parks 1919
†Gryposaurus latidens Horner 1992
†Gryposaurus notabilis Lambe 1914
G. †Kritosaurus Brown 1910
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†Kritosaurus navajovius Brown 1910
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Invalid names: Anasazisaurus horneri Hunt and Lucas 1993 [synonym], Naashoibitosaurus ostromi Hunt and Lucas 1993 [synonym]
Invalid names: Anasazisaurus Hunt and Lucas 1993 [synonym], Naashoibitosaurus Hunt and Lucas 1993 [synonym]