PBDB Taxon

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Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Hadrosauroidea

Reptilia

Taxonomy

Hadrosauroidea was named by Huene (1954).

It was reranked as the unranked clade Hadrosauroidea by Wang et al. (2011), McDonald (2012), Ramírez-Velasco et al. (2012), Cruzado-Caballero and Powell (2017), Wang et al. (2017) and Verdú et al. (2021).

It was assigned to Ornithopoda by Huene (1954); to Ankylopollexia by Godefroit et al. (1998); to Iguanodontia by You et al. (2003) and Ruiz-Omeñaca et al. (2007); to Iguanodontoidea by Sereno (1986), Wang et al. (2011) and Ramírez-Velasco et al. (2012); to Ornithischia by Gasparini et al. (2015); to Ornithopoda by Zhang et al. (2019); and to Hadrosauriformes by Sereno (1997), Sereno (1998), Sereno (1999), You et al. (2003), Godefroit et al. (2004), McDonald et al. (2010), McDonald et al. (2010), McDonald (2012), Wang et al. (2013), Shibata and Azuma (2015), Shibata et al. (2015), Cruzado-Caballero and Powell (2017), Wang et al. (2017) and Verdú et al. (2021).

Synonyms

Iguanodon hillii was named by Newton (1892). It is not extant. Its type locality is near Hitchin, which is in a Cenomanian/Cenomanian basinal (carbonate) marl in the Zig Zag Chalk Formation of the United Kingdom.

It was recombined as Limnosaurus hilli by Nopcsa (1900) and Nopcsa (1901); it was recombined as Craspedodon hillii by Bartholomai and Molnar (1981); it was recombined as Craspedodon hilli by Weishampel and Weishampel (1983); it was misspelled as Orthomerus hilli by Nopcsa (1915) and Kuhn (1964); it was considered a nomen dubium by Buffetaut et al. (1980), Brinkmann (1988), Weishampel and Horner (1990), Horner et al. (2004), Naish and Martill (2008) and Barrett et al. (2014).
Trachodon cantabrigiensis was named by Lydekker (1888). Its type specimen is BMNH R.496, a tooth, and it is a 3D body fossil. Its type locality is Cambridge hadrosaur tooth site, which is in a Cenomanian marine horizon in the West Melbury Chalk Formation of the United Kingdom.

It was recombined as Hadrosaurus cantabrigiensis by Zittel (1890), Nopcsa (1900) and Nopcsa (1901); it was recombined as Anatosaurus cantabrigiensis by Swinton (1970); it was recombined as Telmatosaurus cantabrigiensis by Weishampel and Weishampel (1983); it was considered a nomen dubium by Brinkmann (1988), Weishampel and Horner (1990), Horner et al. (2004), Naish and Martill (2008), Sues and Averianov (2009), Dalla Vecchia (2009) and Barrett et al. (2014).

Synonymy list

Year	Name and author
1888	Trachodon cantabrigiensis Lydekker p. 47
1890	Trachodon cantabrigiensis Woodward and Sherborn p. 292
1890	Hadrosaurus cantabrigiensis Zittel p. 765
1892	Iguanodon hillii Newton
1900	Hadrosaurus cantabrigiensis Nopcsa p. 557
1900	Limnosaurus hilli Nopcsa p. 558
1900	Trachodon cantabrigiensis Van Den Broeck p. 87
1901	Hadrosaurus cantabrigiensis Nopcsa p. 212
1901	Limnosaurus hilli Nopcsa p. 212
1904	Trachodon cantabrigiensis Lydekker p. 61
1909	Trachodon cantabridgiensis Sauvage p. 377
1915	Orthomerus hilli Nopcsa p. 8
1915	Trachodon cantabrigiensis Nopcsa p. 17
1923	Trachodon cantabrigiensis Nopcsa p. 193
1927	Trachodon cantabriensis Huene p. 271
1954	Hadrosauroidea Huene p. 49
1964	Orthomerus hilli Kuhn p. 24
1964	Trachodon cantabrigiensis Kuhn p. 28
1967	Trachodon cantabrigiensis Charig p. 716
1970	Anatosaurus cantabrigiensis Swinton p. 227
1975	Trachodon cantabrigiensis Taquet p. 508
1980	Trachodon cantabrigiensis Buffetaut et al. p. 201
1981	Craspedodon hillii Bartholomai and Molnar p. 343
1983	Craspedodon hilli Weishampel and Weishampel p. 44
1983	Telmatosaurus cantabrigiensis Weishampel and Weishampel p. 44
1986	Hadrosauroidea Sereno
1997	Hadrosauroidea Sereno p. 443
1998	Hadrosauroidea Godefroit et al. pp. 7, 50 fig. 38
1998	Hadrosauroidea Sereno p. 62
1999	Hadrosauroidea Sereno p. 2138 fig. 2
2003	Hadrosauroidea You et al. p. 152 fig. 3
2003	Hadrosauroidea You et al. p. 351 fig. 3
2004	Hadrosauroidea Godefroit et al. p. 141
2007	Hadrosauroidea Ruiz-Omeñaca et al. p. 8
2010	Hadrosauroidea McDonald et al. p. 33 fig. 39
2010	Hadrosauroidea McDonald et al. p. 808 fig. 10
2011	Hadrosauroidea Wang et al. p. 155 fig. 11
2012	Hadrosauroidea McDonald p. 2
2012	Hadrosauroidea Ramírez-Velasco et al. p. 390
2013	Hadrosauroidea Wang et al. p. 3
2015	Hadrosauroidea Gasparini et al. pp. 161-162
2015	Hadrosauroidea Shibata and Azuma
2015	Hadrosauroidea Shibata et al.
2017	Hadrosauroidea Cruzado-Caballero and Powell p. 12 fig. 13
2017	Hadrosauroidea Wang et al.
2019	Hadrosauroidea Zhang et al.
2021	Hadrosauroidea Verdú et al. p. 10 fig. 9

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
—	Sauropsida
class	Reptilia
subclass	Eureptilia	()
—	Romeriida
—	Diapsida	()

Rank	Name	Author
—	Archosauromorpha	(Huene 1946)
—	Crocopoda
—	Archosauriformes	Gauthier 1986
—	Eucrocopoda
—	Archosauria	()
informal	Avemetatarsalia
—	Ornithodira
—	Dinosauromorpha
—	Dinosauriformes
—	Dinosauria	()
—	Ornithischia	()
—	Genasauria
—	Cerapoda
—	Ornithopoda	()
—	Clypeodonta
—	Iguanodontia	()
—	Dryomorpha
—	Styracosterna
—	Hadrosauriformes
—	Hadrosauroidea	()
—	Hadrosauroidea	()

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. †Hadrosauroidea Huene 1954

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G. †Bactrosaurus Gilmore 1933

†Bactrosaurus johnsoni Gilmore 1933

Invalid names: Bactrosaurus prynadai Riabinin 1937 [nomen dubium]

G. †Batyrosaurus Godefroit et al. 2012

†Batyrosaurus rozhdestvenskyi Godefroit et al. 2012

G. †Cedrorestes Gilpin et al. 2007

†Cedrorestes crichtoni Gilpin et al. 2007

G. †Claosaurus Marsh 1890

†Claosaurus agilis Marsh 1872

Invalid names: Claosaurus affinis Wieland 1903 [nomen dubium]

G. †Datonglong Xu et al. 2016

†Datonglong tianzhenensis Xu et al. 2016

G. †Eolambia Kirkland 1998

†Eolambia caroljonesa Kirkland 1998

G. †Equijubus You et al. 2003

†Equijubus normani You et al. 2003

G. †Fukuisaurus Kobayashi and Azuma 2003

†Fukuisaurus tetoriensis Kobayashi and Azuma 2003

G. †Fylax Prieto-Márquez and Carrera Farias 2021

†Fylax thyrakolasus Prieto-Márquez and Carrera Farias 2021

G. †Gilmoreosaurus Brett-Surman 1979

†Gilmoreosaurus mongoliensis Gilmore 1933

G. †Gobihadros Tsogtbaatar et al. 2019

†Gobihadros mongoliensis Tsogtbaatar et al. 2019

G. †Gongpoquansaurus You et al. 2014

†Gongpoquansaurus mazongshanensis Lü 1997

G. †Gonkoken Alarcón-Muñoz et al. 2023

†Gonkoken nanoi Alarcón-Muñoz et al. 2023

Fm. †Hadrosauridae Cope 1869 [hadrosaurid]

G. †Acheralichnus Sánchez Roja 2004

†Acheralichnus leonardii Sánchez Roja 2004

G. †Aquilarhinus Prieto-Márquez et al. 2020

†Aquilarhinus palimentus Prieto-Márquez et al. 2020

G. †Eotrachodon Prieto-Márquez et al. 2016

†Eotrachodon orientalis Prieto-Márquez et al. 2016

Subfm. †Hadrosaurinae Lambe 1918 [hadrosaurine]

G. †Anasazisaurus Hunt and Lucas 1993

†Anasazisaurus horneri Hunt and Lucas 1993 [Anasazi lizard]

Unr. †Brachylophosaurini Gates et al. 2011

G. †Acristavus Gates et al. 2011

†Acristavus gagslarsoni Gates et al. 2011

G. †Brachylophosaurus Sternberg 1953

†Brachylophosaurus canadensis Sternberg 1953

Invalid names: Brachylophosaurus goodwini Horner 1988 [synonym]

G. †Hadrosaurus Leidy 1858

†Hadrosaurus foulkii Leidy 1858

G. †Maiasaura Horner and Makela 1979

†Maiasaura peeblesorum Horner and Makela 1979

G. †Ornatops McDonald et al. 2021

†Ornatops incantatus McDonald et al. 2021

G. †Probrachylophosaurus Freedman Fowler and Horner 2015

†Probrachylophosaurus bergei Freedman Fowler and Horner 2015

G. †Wulagasaurus Godefroit et al. 2008

†Wulagasaurus dongi Godefroit et al. 2008

Tr. †Edmontosaurini Glut 1997

G. †Edmontosaurus Lambe 1917

†Edmontosaurus annectens Marsh 1892

Invalid names: Anatosaurus copei Lull and Wright 1942 [synonym], Edmontosaurus edmontoni Gilmore 1924 [synonym], Edmontosaurus saskatchewanensis Sternberg 1926 [synonym], Trachodon longiceps Marsh 1890 [synonym]

†Edmontosaurus regalis Lambe 1917

Invalid names: Agathaumas milo Cope 1874 [synonym]

Invalid names: Anatosaurus Lull and Wright 1942 [synonym], Anatotitan Brett-Surman 1990 [synonym]

G. †Kerberosaurus Bolotsky and Godefroit 2004

†Kerberosaurus manakini Bolotsky and Godefroit 2004

Invalid names: Kundurosaurus nagornyi Godefroit et al. 2012 [synonym]

Invalid names: Kundurosaurus Godefroit et al. 2012 [synonym]

G. †Shantungosaurus Hu 1973

†Shantungosaurus giganteus Hu 1973

Invalid names: Huaxiaosaurus aigahtens Zhao 2011 [synonym], Zhuchengosaurus maximus Zhao et al. 2007 [synonym]

Invalid names: Huaxiaosaurus Zhao 2011 [synonym], Zhuchengosaurus Zhao et al. 2007 [synonym]

G. †Ugrunaaluk Mori et al. 2016

†Ugrunaaluk kuukpikensis Mori et al. 2016

G. †Kamuysaurus Kobayashi et al. 2019

†Kamuysaurus japonicus Kobayashi et al. 2019

Tr. †Kritosaurini Lapparent and Lavocat 1955

G. †Gryposaurus Lambe 1914

†Gryposaurus alsatei Lehman et al. 2016

†Gryposaurus latidens Horner 1992

†Gryposaurus monumentensis Gates and Sampson 2007

†Gryposaurus notabilis Lambe 1914

Invalid names: Gryposaurus incurvimanus Parks 1919 [synonym]

G. †Huallasaurus Rozadilla et al. 2021

†Huallasaurus australis Bonaparte et al. 1984

G. †Kelumapusaura Rozadilla et al. 2021

†Kelumapusaura machi Rozadilla et al. 2021

G. †Kritosaurus Brown 1910

†Kritosaurus horneri Hunt and Lucas 1993 [Anasazi lizard]

†Kritosaurus navajovius Brown 1910

G. †Naashoibitosaurus Hunt and Lucas 1993

†Naashoibitosaurus ostromi Hunt and Lucas 1993

G. †Secernosaurus Brett-Surman 1979

†Secernosaurus koerneri Brett-Surman 1979

G. †Mandschurosaurus Riabinin 1930

†Mandschurosaurus amurensis Riabinin 1925

Invalid names: Mandschurosaurus laosensis Hoffet 1943 [nomen dubium]

Tr. †Saurolophini Godefroit et al. 2012

G. †Augustynolophus Prieto-Márquez et al. 2015

†Augustynolophus morrisi Prieto-Marquez and Wagner 2013

G. †Bonapartesaurus Cruzado-Caballero and Powell 2017

†Bonapartesaurus rionegrensis Cruzado-Caballero and Powell 2017

G. †Lophorhothon Langston 1960

†Lophorhothon atopus Langston 1960

G. †Prosaurolophus Brown 1916

†Prosaurolophus maximus Brown 1916

Invalid names: Prosaurolophus blackfeetensis Horner 1992 [synonym]

G. †Saurolophus Brown 1912

†Saurolophus angustirostris Rozhdestvensky 1952

†Saurolophus osborni Brown 1912

Subfm. †Lambeosaurinae Parks 1923 [lambeosaurine]

G. †Adelolophus Gates et al. 2014

†Adelolophus hutchisoni Gates et al. 2014

G. †Amurosaurus Bolotsky and Kurzanov 1991

†Amurosaurus riabinini Bolotsky and Kurzanov 1991

Invalid names: Sahaliyania elunchunorum Godefroit et al. 2008 [synonym]

Invalid names: Sahaliyania Godefroit et al. 2008 [synonym]

G. †Angulomastacator Wagner and Lehman 2009

†Angulomastacator daviesi Wagner and Lehman 2009

G. †Aralosaurus Rozhdestvensky 1968

†Aralosaurus tuberiferus Rozhdestvensky 1968

Unr. †Arenysaurini Longrich et al. 2021

G. †Adynomosaurus Prieto-Márquez et al. 2019

†Adynomosaurus arcanus Prieto-Márquez et al. 2019

G. †Ajnabia Longrich et al. 2021

†Ajnabia odysseus Longrich et al. 2021

G. †Arenysaurus Pereda-Suberbiola et al. 2009

†Arenysaurus ardevoli Pereda-Suberbiola et al. 2009

G. †Blasisaurus Cruzado-Caballero et al. 2010

†Blasisaurus canudoi Cruzado-Caballero et al. 2010

G. †Canardia Prieto-Marquez et al. 2013

†Canardia garonnensis Prieto-Marquez et al. 2013

G. †Koutalisaurus Prieto-Márquez et al. 2006

G. †Minqaria Longrich et al. 2024

†Minqaria bata Longrich et al. 2024

G. †Pararhabdodon Casanovas Cladellas 1992

†Pararhabdodon isonensis Casanovas Cladellas 1992

Invalid names: Koutalisaurus kohlerorum Prieto-Márquez et al. 2006 [synonym]

Tr. †Corythosaurini Glut 1997

G. †Corythosaurus Brown 1914

†Corythosaurus casuarius Brown 1914

Invalid names: Corythosaurus bicristatus Parks 1935 [synonym], Corythosaurus brevicristatus Parks 1935 [synonym], Corythosaurus excavatus Gilmore 1923 [synonym], Tetragonosaurus cranibrevis Sternberg 1935 [synonym], Tetragonosaurus erectofrons Parks 1931 [synonym]

†Corythosaurus intermedius Parks 1923

G. †Hypacrosaurus Brown 1913

†Hypacrosaurus altispinus Brown 1913

Invalid names: Cheneosaurus tolmanensis Lambe 1917 [synonym]

†Hypacrosaurus stebingeri Horner and Currie 1994

Invalid names: Cheneosaurus Lambe 1917 [synonym]

G. †Lambeosaurus Parks 1923

†Lambeosaurus clavinitialis Sternberg 1935

Invalid names: Corythosaurus frontalis Parks 1935 [synonym]

†Lambeosaurus lambei Parks 1923

Invalid names: Tetragonosaurus praeceps Parks 1931 [synonym]

†Lambeosaurus magnicristatus Sternberg 1935

Invalid names: Didanodon Osborn 1902 [synonym], Didanodon altidens Osborn 1902 [nomen nudum], Procheneosaurus Matthew 1920 [synonym], Stephanosaurus Lambe 1914 [synonym]

G. †Velafrons Gates et al. 2007 [sail forehead]

†Velafrons coahuilensis Gates et al. 2007

G. †Jaxartosaurus Riabinin 1937

†Jaxartosaurus aralensis Riabinin 1938

Invalid names: Jaxartosaurus fuyunensis Wu 1984 [nomen dubium]

G. †Kazaklambia Bell and Brink 2013

†Kazaklambia convincens Rozhdestvensky 1968

Tr. †Lambeosaurini Sullivan et al. 2011

G. †Magnapaulia Prieto-Marquez et al. 2012

†Magnapaulia laticaudus Morris 1981

G. †Latirhinus Prieto-Márquez and Serrano Brañas 2012

†Latirhinus uitstlani Prieto-Márquez and Serrano Brañas 2012

G. †Nipponosaurus Nagao 1936

†Nipponosaurus sachalinensis Nagao 1936

G. †Olorotitan Godefroit et al. 2003

†Olorotitan arharensis Godefroit et al. 2003

Tr. †Parasaurolophini Glut 1997

G. †Charonosaurus Godefroit et al. 2000

†Charonosaurus jiayinensis Godefroit et al. 2000

G. †Parasaurolophus Parks 1922

†Parasaurolophus cyrtocristatus Ostrom 1961

†Parasaurolophus tubicen Wiman 1931

†Parasaurolophus walkeri Parks 1922

G. †Tlatolophus Ramírez-Velasco et al. 2021

†Tlatolophus galorum Ramírez-Velasco et al. 2021

G. †Tsintaosaurus Young 1958

†Tsintaosaurus spinorhinus Young 1958

Invalid names: Aralosaurini Prieto-Marquez et al. 2013 [empty], Cheneosaurinae Lull and Wright 1942 [synonym], Hadrosaurus paucidens Marsh 1889 [nomen dubium], Stephanosaurinae Lambe 1920 [replaced], Tsintaosaurini Prieto-Marquez et al. 2013 [empty]

G. †Lapampasaurus Coria et al. 2012

†Lapampasaurus cholinoi Coria et al. 2012

G. †Malefica Prieto-Márquez and Wagner 2023

†Malefica deckerti Prieto-Márquez and Wagner 2023

Subfm. †Saurolophinae Brown 1914

G. †Barsboldia Maryanska and Osmólska 1981

†Barsboldia sicinskii Maryanska and Osmólska 1981

G. †Laiyangosaurus Zhang et al. 2019

†Laiyangosaurus youngi Zhang et al. 2019

G. †Rhinorex Gates and Scheetz 2014

†Rhinorex condrupus Gates and Scheetz 2014

Invalid names: Glishades Prieto-Márquez 2010 [nomen dubium]

G. †Tridigitichnus Casamiquela 1994

†Tridigitichnus inopinatus Casamiquela 1994

G. †Yamatosaurus Kobayashi et al. 2021

†Yamatosaurus izanagii Kobayashi et al. 2021

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], Claosauridae Marsh 1890 [synonym], Diclonius Cope 1876 [nomen dubium], Edmontosaurinae Horner 1992 [empty], Euhadrosauria Weishampel et al. 1993 [empty], Gryposaurinae Horner 1992 [empty], Hadrosaurus breviceps Marsh 1889 [nomen dubium], Hadrosaurus cavatus Cope 1871 [nomen dubium], Hadrosaurus minor Marsh 1870 [nomen dubium], Hypsibema Cope 1869 [nomen dubium], Maiasaurinae Horner 1992 [empty], Microhadrosaurus Dong 1979 [nomen dubium], Neosaurus missouriensis Gilmore and Stewart 1945 [nomen dubium], Ornithotarsus Cope 1869 [nomen dubium], Orthomerus Seeley 1883 [nomen dubium], Parrosaurus Gilmore 1945 [nomen dubium], Prohadrosauridae Huene 1956 [synonym], Prohadrosaurinae Young 1958 [empty], Protrachodontidae Nopcsa 1915 [synonym], Pteropelyx Cope 1889 [nomen dubium], Saurolophidae Prieto-Márquez and Wagner 2010 [empty], Saurolophus krystofovici Riabinin 1930 [nomen dubium], Thespesius Leidy 1856 [nomen dubium], Trachodon Leidy 1856 [nomen dubium], Trachodontidae Lydekker 1888 [synonym], Troodon isfarensis Nessov 1995 [nomen dubium], Tyrannosauropus Haubold 1971 [nomen dubium], Willinakaqe Juárez Valieri et al. 2010 [nomen vanum]

G. †Huehuecanauhtlus Ramírez-Velasco et al. 2012

†Huehuecanauhtlus tiquichensis Ramírez-Velasco et al. 2012

G. †Jeyawati McDonald et al. 2010

†Jeyawati rugoculus McDonald et al. 2010

G. †Jintasaurus You and Li 2009

†Jintasaurus meniscus You and Li 2009

G. †Koshisaurus Shibata and Azuma 2015

†Koshisaurus katsuyama Shibata and Azuma 2015

G. †Levnesovia Sues and Averianov 2009

†Levnesovia transoxiana Sues and Averianov 2009

G. †Morelladon Gasulla et al. 2015

†Morelladon beltrani Gasulla et al. 2015

G. †Nanningosaurus Mo et al. 2007

†Nanningosaurus dashiensis Mo et al. 2007

G. †Nanyangosaurus Xu et al. 2000

†Nanyangosaurus zhugeii Xu et al. 2000

Fm. †Ovaloolithidae Mikhailov 1991

G. †Ovaloolithus Zhao 1979

†Ovaloolithus chinkangkouensis Chao and Chiang 1974

†Ovaloolithus dinornithoides Mikhaillov 1994

†Ovaloolithus huangtulingensis Yu 1998

†Ovaloolithus laminadermus Young 1954

†Ovaloolithus mixistriatus Zhao 1979

†Ovaloolithus monostriatus Zhao 1979

†Ovaloolithus sangpingensis Fang 1998

†Ovaloolithus tenuisus Bray 1999

†Ovaloolithus tristriatus Zhao 1979

†Ovaloolithus turpanensis Zhang and Wang 2010

†Ovaloolithus utahensis Bray 1999

†Ovaloolithus weiqiaoensis Yu 1998

G. †Penelopognathus Godefroit et al. 2005

†Penelopognathus weishampeli Godefroit et al. 2005

G. †Plesiohadros Tsogtbaatar et al. 2014

†Plesiohadros djadokhtaensis Tsogtbaatar et al. 2014

G. †Portellsaurus Santos-Cubedo et al. 2021

†Portellsaurus sosbaynati Santos-Cubedo et al. 2021

G. †Probactrosaurus Rozhdestvensky 1966

†Probactrosaurus gobiensis Rozhdestvensky 1966

Invalid names: Probactrosaurus alashanicus Rozhdestvensky 1966 [synonym]

G. †Protohadros Head 1998

†Protohadros byrdi Head 1998

G. †Ratchasimasaurus Shibata et al. 2011

†Ratchasimasaurus suranareae Shibata et al. 2011

G. †Shuangmiaosaurus You et al. 2003

†Shuangmiaosaurus gilmorei You et al. 2003

G. †Sirindhorna Shibata et al. 2015

†Sirindhorna khoratensis Shibata et al. 2015

Fm. †Spheroolithidae Zhao 1979

G. †Guegoolithus Moreno-Azanza et al. 2014

†Guegoolithus turolensis Amo Sanjuán et al. 2000

G. †Spheroolithus Zhao 1979

†Spheroolithus albertensis Zelenitsky and Hills 1997

†Spheroolithus choteauensis Jackson and Varricchio 2010

†Spheroolithus europaeus Sellés et al. 2014

†Spheroolithus irenensis Chao and Chiang 1974

†Spheroolithus jincunensis Fang et al. 2003

†Spheroolithus maiasauroides Mikhaillov 1994

†Spheroolithus quantouensis Zhang 2022

†Spheroolithus spheroides Young 1954

Invalid names: Oolithes chiangchiungtingensis Young 1954 [synonym]

†Spheroolithus tenuicorticus Mikhaillov 1994

Invalid names: Paraspheroolithus Zhao 1979 [synonym]

G. †Tanius Wiman 1929

†Tanius chingkankouensis Young 1958

†Tanius sinensis Wiman 1929

Invalid names: Tanius laiyangensis Zhen 1976 [nomen dubium]

G. †Telmatosaurus Nopcsa 1903

†Telmatosaurus transsylvanicus Nopcsa 1900

Invalid names: Hecatasaurus Brown 1910 [synonym], Limnosaurus Nopcsa 1900 [replaced]

G. †Tethyshadros Dalla Vecchia 2009

†Tethyshadros insularis Dalla Vecchia 2009

G. †Xuwulong You et al. 2011

†Xuwulong yueluni You et al. 2011

G. †Yunganglong Wang et al. 2013

†Yunganglong datongensis Wang et al. 2013

G. †Zhanghenglong Xing et al. 2014

†Zhanghenglong yangchengensis Xing et al. 2014

G. †Zuoyunlong Wang et al. 2017

†Zuoyunlong huangi Wang et al. 2017

Invalid names: Iguanodon hillii Newton 1892 [nomen dubium], Trachodon cantabrigiensis Lydekker 1888 [nomen dubium]

Diagnosis

Reference	Diagnosis
P. Godefroit et al. 1998	Iguanodontia characterized by more than one replacement tooth in each tooth position; crowns firmly cemented together to form a rigid battery; articular surface of the occipital condyle not steeply inclined downwards; basipterygoid processes long and slender, projecting more ventrally than the occipital condyle; presence of fontanelles on the skull of younger specimens; absence of surangular foramen; maxillary teeth miniaturized, bearing a single large carina; preacetabular process of ilium very deflected ventrally; antitrochanter of ilium developed; obturator foramen of pubis fully open; transverse widening of the proximal head of the tibia extending distally.