Classification of Horner et al. 2004

Diclonius pentagonus Cope 1876
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Fm. †Hadrosauridae Cope 1869 [hadrosaurid]
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G. †Bactrosaurus Gilmore 1933
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Bactrosaurus johnsoni Gilmore 1933
Invalid names: Bactrosaurus prynadai Riabinin 1937 [nomen dubium]
G. †Claosaurus Marsh 1890
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Claosaurus agilis Marsh 1872
Invalid names: Claosaurus affinis Wieland 1903 [nomen dubium]
G. †Gilmoreosaurus Brett-Surman 1979
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Subfm. †Lambeosaurinae Parks 1923 [lambeosaurine]
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G. †Amurosaurus Bolotsky and Kurzanov 1991
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Amurosaurus riabinini Bolotsky and Kurzanov 1991
G. †Barsboldia Maryanska and Osmólska 1981
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Barsboldia sicinskii Maryanska and Osmólska 1981
G. †Charonosaurus Godefroit et al. 2000
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Charonosaurus jiayinensis Godefroit et al. 2000
G. †Corythosaurus Brown 1914
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Invalid names: Corythosaurus bicristatus Parks 1935 [synonym], Corythosaurus brevicristatus Parks 1935 [synonym], Corythosaurus excavatus Gilmore 1923 [synonym], Corythosaurus intermedius Parks 1923 [synonym], Tetragonosaurus cranibrevis Sternberg 1935 [synonym], Tetragonosaurus erectofrons Parks 1931 [synonym]
G. †Hypacrosaurus Brown 1913
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Invalid names: Cheneosaurus tolmanensis Lambe 1917 [synonym]
Hypacrosaurus stebingeri Horner and Currie 1994
Invalid names: Cheneosaurus Lambe 1917 [synonym]
G. †Jaxartosaurus Riabinin 1937
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Jaxartosaurus aralensis Riabinin 1938
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Invalid names: Procheneosaurus convincens Rozhdestvensky 1968 [synonym]
Invalid names: Jaxartosaurus fuyunensis Wu 1984 [nomen dubium]
G. †Lambeosaurus Parks 1923
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Lambeosaurus lambei Parks 1923
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Invalid names: Corythosaurus frontalis Parks 1935 [synonym], Lambeosaurus clavinitialis Sternberg 1935 [synonym], Tetragonosaurus praeceps Parks 1931 [synonym]
Lambeosaurus laticaudus Morris 1981
Lambeosaurus magnicristatus Sternberg 1935
Invalid names: Didanodon Osborn 1902 [synonym]
G. †Nipponosaurus Nagao 1936
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G. †Olorotitan Godefroit et al. 2003
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Olorotitan arharensis Godefroit et al. 2003
G. †Parasaurolophus Parks 1922
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G. †Tsintaosaurus Young 1958
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Invalid names: Tanius laiyangensis Zhen 1976 [synonym]
G. †Secernosaurus Brett-Surman 1979
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Secernosaurus koerneri Brett-Surman 1979
G. †Tanius Wiman 1929
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Tanius sinensis Wiman 1929
G. †Telmatosaurus Nopcsa 1903
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Invalid names: Limnosaurus Nopcsa 1900 [replaced]
Invalid names: Arstanosaurus Shilin and Suslov 1982 [nomen dubium], Arstanosaurus akkurganensis Shilin and Suslov 1982 [nomen dubium], Cionodon Cope 1874 [nomen dubium], Claorhynchus Cope 1892 [nomen dubium], Diclonius Cope 1876 [nomen dubium], Euhadrosauria Weishampel et al. 1993 [empty], Hadrosaurus breviceps Marsh 1889 [nomen dubium], Hadrosaurus cavatus Cope 1871 [nomen dubium], Hadrosaurus minor Marsh 1870 [nomen dubium], Hadrosaurus paucidens Marsh 1889 [nomen dubium], Hypsibema Cope 1869 [nomen dubium], Iguanodon hilli Newton 1892 [nomen dubium], Kritosaurus Brown 1910 [nomen dubium], Mandschurosaurus Riabinin 1930 [nomen dubium], Microhadrosaurus Dong 1979 [nomen dubium], Neosaurus missouriensis Gilmore and Stewart 1945 [nomen dubium], Orthomerus Seeley 1883 [nomen dubium], Parrosaurus Gilmore 1945 [nomen dubium], Pteropelyx Cope 1889 [nomen dubium], Saurolophus kryschtofovici Riabinin 1930 [nomen dubium], Thespesius Leidy 1856 [nomen dubium], Trachodon Leidy 1856 [nomen dubium]
G. †Stegoceras Lambe 1902
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Stegoceras validum Lambe 1902
G. †Dysganus Cope 1876
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Invalid names: Dysganus encaustus Cope 1876 [nomen dubium]
G. †Avaceratops Dodson 1986
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Avaceratops lammersi Dodson 1986