Classification of Williamson 2000
Fm. †Hadrosauridae Cope 1869 [hadrosaurid]
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Subfm. †Hadrosaurinae Lambe 1918 [hadrosaurine]
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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]
Subfm. †Lambeosaurinae Parks 1923 [lambeosaurine]
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G. †Parasaurolophus Parks 1922
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†Parasaurolophus cyrtocristatus Ostrom 1961
†Parasaurolophus tubicen Wiman 1931