Classification of the infraorder Iguanodontia
Unr. †Iguanodontia Baur 1891
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Unr. †Dryomorpha Sereno 1986
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Unr. †Ankylopollexia Sereno 1986
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G. †Camptosaurus Marsh 1885
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†Camptosaurus aphanoecetes Carpenter and Wilson 2008
†Camptosaurus dispar Marsh 1879
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Invalid names: Brachyrophus altarkansanus Cope 1878 [synonym], Camptosaurus browni Gilmore 1909 [synonym], Camptosaurus medius Marsh 1894 [synonym], Camptosaurus nanus Marsh 1894 [synonym], Symphyrophus musculosus Cope 1878 [synonym]
Invalid names: Brachyrophus Cope 1878 [synonym], Camptonotus Marsh 1879 [replaced], Symphyrophus Cope 1878 [synonym], Uteodon McDonald 2011 [synonym]
G. †Iguanodon Mantell 1825
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†Iguanodon galvensis Verdú et al. 2015
†Iguanodon major Owen 1842
Invalid names: Heterosaurus Cornuel 1850 [synonym], Iguanodon anglicus Holl 1829 [nomen dubium], Iguanosaurus Anonymous 1824 [synonym], Struthopus Ballerstedt 1922 [synonym], Therosaurus Fitzinger 1843 [synonym]
Unr. †Neoiguanodontia Norman 2014
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G. †Hypselospinus Norman 2010
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†Hypselospinus fittoni Lydekker 1889
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Invalid names: Darwinsaurus evolutionis Paul 2012 [synonym], Huxleysaurus hollingtoniensis Lydekker 1889 [synonym]
Invalid names: Darwinsaurus Paul 2012 [synonym], Wadhurstia Carpenter and Ishida 2010 [objective synonym]
Fm. †Iguanodontidae Bonaparte 1850 [iguanodontid]
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G. †Barilium Norman 2010
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Invalid names: Kukufeldia McDonald et al. 2010 [synonym], Sellacoxa Carpenter and Ishida 2010 [synonym], Torilion Carpenter and Ishida 2010 [objective synonym]
G. †Bolong Wu et al. 2010
G. †Jinzhousaurus Wang and Xu 2001
G. †Proiguanodon Van Den Broeck 1900
Invalid names: Cetiosaurus brachyurus Owen 1842 [nomen dubium], Ornithopodidae Zittel 1895 [synonym]
Invalid names: Hadrosauromorpha Norman 2014 [empty]
G. †Oblitosaurus Sánchez-Fenollosa et al. 2023
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†Oblitosaurus bunnueli Sánchez-Fenollosa et al. 2023
Fm. †Dryosauridae Milner and Norman 1984
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G. †Dryosaurus Marsh 1894
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†Dryosaurus altus Marsh 1878
†Dryosaurus elderae Carpenter and Galton 2018
Unr. †Styracosterna Sereno 1986
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Unr. †Hadrosauriformes Sereno 1997
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Unr. †Hadrosauroidea Huene 1954
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G. †Bactrosaurus Gilmore 1933
G. †Batyrosaurus Godefroit et al. 2012
G. †Cedrorestes Gilpin et al. 2007
G. †Claosaurus Marsh 1890
G. †Datonglong Xu et al. 2016
G. †Eolambia Kirkland 1998
G. †Equijubus You et al. 2003
G. †Fukuisaurus Kobayashi and Azuma 2003
G. †Fylax Prieto-Márquez and Carrera Farias 2021
G. †Gilmoreosaurus Brett-Surman 1979
G. †Gobihadros Tsogtbaatar et al. 2019
G. †Gongpoquansaurus You et al. 2014
G. †Gonkoken Alarcón-Muñoz et al. 2023
Fm. †Hadrosauridae Cope 1869 [hadrosaurid]
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Invalid names: Claosauridae Marsh 1890 [synonym], Prohadrosauridae Huene 1956 [synonym], Protrachodontidae Nopcsa 1915 [synonym], Trachodontidae Lydekker 1888 [synonym]
G. †Huehuecanauhtlus Ramírez-Velasco et al. 2012
G. †Jeyawati McDonald et al. 2010
G. †Jintasaurus You and Li 2009
G. †Koshisaurus Shibata and Azuma 2015
G. †Levnesovia Sues and Averianov 2009
G. †Morelladon Gasulla et al. 2015
G. †Nanningosaurus Mo et al. 2007
G. †Nanyangosaurus Xu et al. 2000
Fm. †Ovaloolithidae Mikhailov 1991
G. †Penelopognathus Godefroit et al. 2005
G. †Plesiohadros Tsogtbaatar et al. 2014
G. †Portellsaurus Santos-Cubedo et al. 2021
G. †Probactrosaurus Rozhdestvensky 1966
G. †Protohadros Head 1998
G. †Ratchasimasaurus Shibata et al. 2011
G. †Shuangmiaosaurus You et al. 2003
G. †Sirindhorna Shibata et al. 2015
Fm. †Spheroolithidae Zhao 1979
G. †Tanius Wiman 1929
G. †Telmatosaurus Nopcsa 1903
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Invalid names: Hecatasaurus Brown 1910 [synonym], Limnosaurus Nopcsa 1900 [replaced]
G. †Tethyshadros Dalla Vecchia 2009
G. †Xuwulong You et al. 2011
G. †Yunganglong Wang et al. 2013
G. †Zhanghenglong Xing et al. 2014
G. †Zuoyunlong Wang et al. 2017
Invalid names: Iguanodon hillii Newton 1892 [nomen dubium], Trachodon cantabrigiensis Lydekker 1888 [nomen dubium]
Invalid names: Dryosauroidea Norman 1984 [empty]
Unr. †Elasmaria Calvo et al. 2007
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G. †Atlascopcosaurus Rich and Vickers-Rich 1989
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†Atlascopcosaurus loadsi Rich and Vickers-Rich 1989
G. †Leaellynasaura Rich and Vickers-Rich 1989
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†Leaellynasaura amicagraphica Rich and Vickers-Rich 1989
G. †Mahuidacursor Cruzado-Caballero et al. 2019
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†Mahuidacursor lipanglef Cruzado-Caballero et al. 2019
Superfm. †Iguanodontoidea Hay 1902
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G. †Lurdusaurus Taquet and Russell 1999
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†Lurdusaurus arenatus Taquet and Russell 1999
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Invalid names: Gravisaurus tenerensis Chabli 1988 [objective synonym]
Invalid names: Gravisaurus Chabli 1988 [objective synonym]
Invalid names: Hadrosauria Horner 1990 [empty], Iguanodon orientalis Rozhdestvensky 1952 [nomen dubium], Lambeosauria Horner 1990 [empty]
G. †Mantellisaurus Paul 2007
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†Mantellisaurus atherfieldensis Hooley 1925
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Invalid names: Dollodon bampingi Paul 2008 [synonym], Heterosaurus neocomiensis Cornuel 1850 [synonym], Mantellodon carpenteri Paul 2012 [synonym]
Invalid names: Dollodon Paul 2008 [synonym], Mantellodon Paul 2012 [synonym], Proplanicoxa Carpenter and Ishida 2010 [nomen dubium]
Unr. †Rhabdodontomorpha Dieudonné et al. 2016
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G. †Muttaburrasaurus Bartholomai and Molnar 1981
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†Muttaburrasaurus langdoni Bartholomai and Molnar 1981
Fm. †Rhabdodontidae Weishampel et al. 2003 [rhabdodontid]
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G. †Mochlodon Seeley 1881
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†Mochlodon priscus Matheron 1869
†Mochlodon vorosi Osi et al. 2012
†Rhabdodon suessi Bunzel 1871
G. †Pareisactus Párraga and Prieto-Márquez 2019
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†Pareisactus evrostos Párraga and Prieto-Márquez 2019
G. †Rhabdodon Matheron 1869
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†Rhabdodon priscus Matheron 1869
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Invalid names: Oligosaurus adelus Seeley 1881 [synonym], Ornithomerus gracilis Seeley 1881 [synonym]
†Rhabdodon septimanicus Buffetaut and Le Loeuff 1991
Invalid names: Oligosaurus Seeley 1881 [synonym], Ornithomerus Seeley 1881 [synonym]
G. †Zalmoxes Weishampel et al. 2003
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†Zalmoxes robustus Nopcsa 1900
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Invalid names: Camptosaurus inkeyi Nopcsa 1900 [synonym], Onychosaurus hungaricus Nopcsa 1902 [synonym]
†Zalmoxes shqiperorum Weishampel et al. 2003
Invalid names: Onychosaurus Nopcsa 1902 [synonym]
G. †Tenontosaurus Ostrom 1970
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†Tenontosaurus dossi Winkler et al. 1997
†Tenontosaurus tilletti Ostrom 1970
Invalid names: Albisaurus Fritsch 1905 [nomen dubium], Albisaurus scutifer Fritsch 1905 [nomen dubium], Anoplosaurus major Seeley 1879 [nomen dubium], Bihariosaurus Marinescu 1989 [nomen nudum], Camptosauroidea Cooper 1985 [empty], Eucercosaurus Seeley 1879 [nomen dubium], Eucercosaurus tanyspondylus Seeley 1879 [nomen dubium], Euiguanodontia Coria and Salgado 1996 [empty], Fulgurotherium Huene 1932 [nomen dubium], Iguanodon ottingeri Galton and Jensen 1979 [nomen dubium], Loncosaurus Ameghino 1899 [nomen dubium], Procerosaurus exogirarum Fritsch 1878 [nomen dubium], Sphenospondylus Seeley 1883 [nomen dubium], Syngonosaurus Seeley 1879 [nomen dubium], Syngonosaurus macrocercus Seeley 1869 [nomen dubium], Tichosteus Cope 1877 [nomen dubium], Vectisaurus Hulke 1879 [nomen dubium]