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Neornithischia
Taxonomy
Neornithischia was named by Cooper (1985). It was considered monophyletic by Butler et al. (2008), Butler and Sullivan (2009).
It was reranked as the unranked clade Neornithischia by Sereno (1997), Sereno (1998), Sereno (1999), Butler et al. (2007), Butler et al. (2008), Butler and Sullivan (2009), Han et al. (2012), Zheng et al. (2012), Madzia et al. (2018), Herne et al. (2019), Arbour and Evans (2019), Fonseca et al. (2024), Yang et al. (2025), Jung et al. (2026).
It was assigned to Ornithischia by Cooper (1985); to Genasauria by Sereno (1997), Sereno (1998), Sereno (1999), Butler et al. (2007), Butler et al. (2008), Butler and Sullivan (2009), Fonseca et al. (2024); and to Ornithischia by Han et al. (2012), Zheng et al. (2012), Madzia et al. (2018), Herne et al. (2019), Arbour and Evans (2019), Yang et al. (2025), Jung et al. (2026).
It was reranked as the unranked clade Neornithischia by Sereno (1997), Sereno (1998), Sereno (1999), Butler et al. (2007), Butler et al. (2008), Butler and Sullivan (2009), Han et al. (2012), Zheng et al. (2012), Madzia et al. (2018), Herne et al. (2019), Arbour and Evans (2019), Fonseca et al. (2024), Yang et al. (2025), Jung et al. (2026).
It was assigned to Ornithischia by Cooper (1985); to Genasauria by Sereno (1997), Sereno (1998), Sereno (1999), Butler et al. (2007), Butler et al. (2008), Butler and Sullivan (2009), Fonseca et al. (2024); and to Ornithischia by Han et al. (2012), Zheng et al. (2012), Madzia et al. (2018), Herne et al. (2019), Arbour and Evans (2019), Yang et al. (2025), Jung et al. (2026).
Synonymy list
| Year | Name and author |
|---|---|
| 1985 | Neornithischia Cooper p. 287 |
| 1997 | Neornithischia Sereno p. 443 |
| 1998 | Neornithischia Sereno p. 61 |
| 1999 | Neornithischia Sereno p. 2138 fig. 2 |
| 2007 | Neornithischia Butler et al. p. 2044 |
| 2008 | Neornithischia Butler et al. pp. 13-16 figs. 2-4 |
| 2009 | Neornithischia Butler and Sullivan p. 22 |
| 2012 | Neornithischia Han et al. p. 1391 fig. 14 |
| 2012 | Neornithischia Zheng et al. p. 210 |
| 2018 | Neornithischia Madzia et al. |
| 2019 | Neornithischia Arbour and Evans |
| 2019 | Neornithischia Herne et al. p. 574 fig. 25 |
| 2024 | Neornithischia Fonseca et al. |
| 2025 | Neornithischia Yang et al. |
| 2026 | Neornithischia Jung et al. |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
Unr. †Neornithischia Cooper 1985
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G. †Enigmacursor Maidment and Barrett 2025
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†Enigmacursor mollyborthwickae Maidment and Barrett 2025
Fm. †Jeholosauridae Han et al. 2012
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G. †Nanosaurus Marsh 1877
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†Nanosaurus agilis Marsh 1877
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Invalid names: Drinker nisti Bakker et al. 1990 [synonym], Nanosaurus rex Marsh 1877 [synonym], Othnielosaurus consors Marsh 1894 [synonym]
Invalid names: Drinker Bakker et al. 1990 [synonym], Othnielosaurus Galton 2007 [synonym]
Unr. †Pyrodontia Fonseca et al. 2024
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Unr. †Cerapoda Sereno 1986
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Unr. †Marginocephalia Sereno 1986
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Subor. †Ceratopsia Marsh 1890 [ceratopsian]
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G. †Ajkaceratops Osi et al. 2010
G. †Albalophosaurus Ohashi and Barrett 2009
Fm. †Chaoyangsauridae Zhao 1983
G. †Ferenceratops Maidment et al. 2026
G. †Micropachycephalosaurus Dong 1978
Infraor. †Neoceratopsia Sereno 1986
G. †Notoceratops Tapia 1919 [southern horn face]
Fm. †Psittacosauridae Osborn 1923
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Invalid names: Protiguanodontidae Osborn 1923 [synonym], Stenopelyxidae Nopcsa 1927 [synonym]
G. †Psittacosaurus Osborn 1923
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Invalid names: Hongshanosaurus You et al. 2003 [synonym], Protiguanodon Osborn 1923 [synonym]
G. †Serendipaceratops Rich and Vickers-Rich 2003
Invalid names: Chaoyangosauridae Dong 1992 [empty], Dysganus Cope 1876 [nomen dubium], Eoceratopsinae Lambe 1915 [empty], Kulceratops Nessov 1995 [nomen dubium], Kulceratops kulensis Nessov 1995 [nomen dubium], Microceratus Mateus 2008 [nomen dubium], Pachyrhinosauridae Sternberg 1950 [empty], Ponderopoda Huene 1948 [synonym], Psittacosauroidea Zhao 1983 [empty], Psittacosaurus sattayaraki Buffetaut and Ingavat 1992 [nomen dubium]
Subor. †Pachycephalosauria Maryańska and Osmólska 1974
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Unr. †Eupachycephalosauria Dieudonné et al. 2020
G. †Goyocephale Perle et al. 1982
Infraor. †Goyocephalia Sereno 1986
G. †Qiyunshanpus Yu 1998
G. †Wannanosaurus Hou 1977
G. †Zavacephale Chinzorig et al. 2025
Invalid names: Homalocephalidae Dong 1978 [empty], Pachycephalosauroidea Zhao 1983 [empty], Tianchungosauroidea Zhao 1983 [empty]
Subor. †Ornithopoda Marsh 1881 [ornithopod]
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Fm. †Anomoepodidae Lull 1904
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G. †Apatichnus Hitchcock 1858
G. †Eoanomoepus Lockley et al. 2018
G. †Neoanomoepus Lockley et al. 2009
G. †Shenmuichnus Li et al. 2012
G. †Dinosauropodes Douglass 1932
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†Dinosauropodes bransfordii Lull 1932
†Dinosauropodes crawfordii Lull 1932
†Dinosauropodes magrawii Lull 1932
†Dinosauropodes nettletoni Lull 1932
†Dinosauropodes osborni Lull 1932
†Dinosauropodes sternbergii Lull 1932
†Dinosauropodes sweetii Lull 1932
†Dinosauropodes wilsoni Lull 1932
Unr. †Euornithopoda Sereno 1986
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Infraor. †Heterodontosauria Cooper 1985
Invalid names: Camptosaurus valdensis Lydekker 1889 [nomen dubium], Gilmoreosaurus atavus Nessov 1995 [nomen dubium], Hypsilophodon wielandi Galton and Jensen 1979 [nomen dubium]
Fm. †Hypsilophodontidae Dollo 1882 [hypsilophodontid]
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G. †Daurosaurus Alifanov and Saveliev 2014
G. †Gideonmantellia Ruiz-Omeñaca et al. 2012
G. †Hypsilophodon Huxley 1870
G. †Vectidromeus Longrich et al. 2024
Invalid names: Dryosaurinae Cooper 1985 [empty], Hypsilophodontinae Abel 1919 [empty], Kalodontidae Nopcsa 1901 [synonym], Laosauridae Marsh 1895 [synonym], Macelognathidae Marsh 1884 [synonym], Nanosaurinae Marsh 1878 [empty], Parksosauridae Buchholz 2002 [empty]
Infraor. †Iguanodontia Baur 1891
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G. †Choyrodon Gates et al. 2018
Unr. †Euiguanodontia Coria and Salgado 1996
Superfm. †Iguanodontoidea Hay 1902
G. †Mantellisaurus Paul 2007
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Invalid names: Dollodon Paul 2008 [synonym], Mantellodon Paul 2012 [synonym]
G. †Osmakasaurus McDonald 2011
G. †Planicoxa DiCroce and Carpenter 2001
Unr. †Rhabdodontomorpha Dieudonné et al. 2016
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], 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]
Fm. †Iguanodontipodidae Vyalov 1987
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G. †Caririchnium Leonardi 1984
G. †Kharkushosauropus Dzhalilov and Novikov 1993
Invalid names: Brachyguanodonipus Moratalla 1993 [nomen dubium], Gigantoshiraminesauropus Azuma and Takeyama 1991 [nomen dubium], Hadrosaurichnoides Casanovas Cladellas et al. 1994 [nomen dubium], Hadrosauropodus nanxiongensis Xing et al. 2009 [nomen dubium], Iguanodonipus Moratalla 1993 [nomen dubium], Limayichnus Calvo 1991 [nomen dubium], Ornithopodichnus Kim et al. 2009 [nomen dubium], Shiraminesauropus Azuma and Takeyama 1991 [nomen dubium], Sousaichnium Leonardi 1979 [nomen dubium], Staurichnium Leonardi 1979 [nomen dubium], Wealdenichnites Kuhn 1958 [nomen dubium]
Fm. †Iguanodontipodidae Lockley et al. 2014
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G. †Amblydactylus Sternberg 1932
G. †Hadrosauropodus Lockley et al. 2003
G. †Iguanodontipus Sarjeant et al. 1998
Fm. †Moyenisauropodidae Ellenberger 1974
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G. †Anomoepus Hitchcock 1848
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Invalid names: Hopiichnus Welles 1971 [synonym], Moyenisauropus Ellenberger 1970 [synonym], Shensipus Young 1966 [synonym]
G. †Psilotrisauropus Ellenberger 1972
G. †Unespichnium Bertini and Carvalho 2003
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†Unespichnium ornithopodianus Bertini and Carvalho 2003
G. †Wintonopus Thulborn and Wade 1984
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†Wintonopus latomorum Thulborn and Wade 1984
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Invalid names: Skartopus australis Thulborn and Wade 1984 [synonym]
†Wintonopus middletonae Salisbury et al. 2016
Invalid names: Skartopus Thulborn and Wade 1984 [synonym]
Invalid names: Bonaparteichnium Calvo 1991 [nomen dubium], Brachypoda Thulborn 1974 [empty], Camptosaurichnus Casamiquela and Fasola 1968 [nomen dubium], Camptosauropus Gabuniya and Kurbatov 1988 [nomen dubium], Dolichopoda Thulborn 1974 [empty], Gilmoreosaurus arkhangelskyi Nessov 1995 [nomen dubium], Goseongosauripus Kim 1986 [nomen dubium], Jiayinosauropus Dong et al. 2003 [nomen dubium], Kalodontoidea Huene 1948 [empty], Laosaurus Marsh 1878 [nomen dubium], Laosaurus celer Marsh 1878 [nomen dubium], Laosaurus minimus Gilmore 1924 [nomen dubium], Ornithopodoidea Nopcsa 1929 [synonym], Ornithopoidea Nopcsa 1929 [empty], Othnielia Galton 1977 [nomen dubium], Phyllodon Thulborn 1975 [nomen dubium], Siluosaurus Dong 1997 [nomen dubium], Taponichnus Alonso and Marquillas 1986 [nomen dubium], Telosichnus Alonso and Marquillas 1986 [nomen dubium], Trachodontoidea Huene 1948 [empty]
Invalid names: Chasmatopia Buchholz 2002 [empty]
G. †Stormbergia Butler 2005
Fm. †Thescelosauridae Sternberg 1937
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Subfm. †Orodrominae Brown et al. 2013
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Subfm. †Thescelosaurinae Sternberg 1940
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G. †Thescelosaurus Gilmore 1913
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†Thescelosaurus assiniboiensis Brown et al. 2011
†Thescelosaurus edmontonensis Sternberg 1940
†Thescelosaurus garbanii Morris 1976
†Thescelosaurus neglectus Gilmore 1913
Invalid names: Bugenasaura Galton 1995 [synonym], Bugenasaura infernalis Galton 1995 [nomen dubium]
Invalid names: Neornithopoda Norman 1984 [empty]
Diagnosis
No diagnoses are available