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Iguanodontia

Osteichthyes

Discussion

This has commonly been cited as having been named by Dollo (1888), since being listed as such in Sereno (1986) with a reference to Hay (1902). But this is incorrect - Dollo named no such group, and Hay was in error, cited presumably without reference back to Dollo (1888) by Sereno (1986). The first known usage of the name is Baur (1891).

Taxonomy
Iguanodontia was named by Baur (1891).

It was synonymized subjectively with Ornithopoda by Matthew (1915), Kuhn (1966); it was reranked as the infraorder Iguanodontia by Sereno (1986); it was reranked as the order Iguanodontia by Sancarlo et al. (2025); it was reranked as the unranked clade Iguanodontia by Sereno (1997), Sereno (1998), Sereno (1999), Buchholz (2002), Norman (2004), Sánchez-Hernández et al. (2007), Butler et al. (2008), Galton (2009), Shibata et al. (2011), Han et al. (2012), Norman (2014), Escaso et al. (2014), Gasulla et al. (2015), Shibata et al. (2015), Wang et al. (2017), Madzia et al. (2018), Xu et al. (2018), Herne et al. (2019), Ibiricu et al. (2019), Prieto-Márquez et al. (2019), Dieudonné et al. (2020), Verdú et al. (2021), Bertozzo et al. (2025), Yao et al. (2026), Magyar et al. (2026), Huang et al. (2026).

It was assigned to Archosauria by Baur (1891); to Hypsilophodontia by Cooper (1985); to Euornithopoda by Benton (1990), Weishampel and Heinrich (1992), Sereno (1997), Sereno (1998), Sereno (1999), Buchholz (2002), Norman (2004), Sachs and Hornung (2006), Galton (2007), Galton (2009); to Clypeodonta by Norman (2014), Herne et al. (2019), Dieudonné et al. (2020); to Ornithopoda by Lull (1912), Russell (1984), Sereno (1986), Norman (1989), Godefroit et al. (1998), Norman and Sues (2000), Novas et al. (2004), Fonseca et al. (2024); to Ornithischia by Shibata et al. (2015), Huang et al. (2026); and to Ornithopoda by Sánchez-Hernández et al. (2007), Butler et al. (2008), Shibata et al. (2011), Han et al. (2012), Escaso et al. (2014), Gasulla et al. (2015), Wang et al. (2017), Madzia et al. (2018), Xu et al. (2018), Ibiricu et al. (2019), Prieto-Márquez et al. (2019), Verdú et al. (2021), Sancarlo et al. (2025), Bertozzo et al. (2025), Yao et al. (2026), Magyar et al. (2026).

Synonyms
Synonymy list
YearName and author
1877Tichosteus Cope pp. 194-195
1877Tichosteus lucasanus Cope p. 194
1878Tichosteus lucasanus Cope p. 246
1878Tichosteus aequifacies Cope p. 392
1878Iguanodon exogirarum Fritsch p. 3
1879Vectisaurus valdensis Hulke
1879Vectisaurus Hulke p. 294
1879Vectisaurus valdensis Hulke p. 421
1879Eucercosaurus Seeley
1879Syngonosaurus Seeley
1879Eucercosaurus Seeley p. 613 figs. 4-5
1879Eucercosaurus tanyspondylus Seeley p. 613
1879Syngonosaurus Seeley p. 621 figs. 6-8
1879Anoplosaurus major Seeley p. 631
1882Vectisaurus Dollo
1882Vectisaurus Marsh
1882Anoplosaurus major Sauvage p. 30
1882Eucercosaurus tanyspondylus Sauvage p. 31
1882Vectisaurus Sauvage p. 35
1882Sygnosaurus Sauvage p. 36
1882Sygmosaurus Sauvage p. 1265
1883Sphenospondylus Seeley p. 55 figs. 1-5
1884Vectisaurus Dollo p. 298
1884Vectisaurus Marsh p. 68
1885Vectisaurus Marsh p. 764
1888Sphenospondylus Lydekker p. 46
1888Sphenospondylus gracilis Lydekker p. 47
1888Vectisaurus Lydekker pp. 52-53
1888Sphenospondylus Lydekker p. 238
1888Sphenospondylus gracilis Lydekker p. 238
1889Vectisaurus valdensis Bristow et al. p. 12
1889Syngonosaurus Lydekker pp. 41-42
1889Sphenospondylus gracilis Newton p. 260
1889Vectisaurus valdensis Newton p. 260
1890Anoplosaurus major Woodward and Sherborn p. 210
1890Eucercosaurus tanyspondylus Woodward and Sherborn p. 229
1890Sphenospondylus gracilis Woodward and Sherborn p. 283
1890Vectisaurus valdensis Woodward and Sherborn p. 295
1890Tichosteus Zittel p. 732
1890Eucercosaurus Zittel p. 742
1890Syngonosaurus Zittel p. 742
1890Vectisaurus Zittel p. 743
1890Sphenospondylus Zittel p. 765
1891Iguanodontia Baur pp. 450-451
1893Iguanodon albinus Fritsch pp. 55, 65-66
1895Vectisaurus Marsh
1896Sphenospondylus Marsh p. 226
1896Vectisaurus Marsh p. 244
1899Loncosaurus Ameghino p. 61
1899Loncosaurus argentinus Ameghino p. 61
1900Loncosaurus argentinus Ameghino p. 160
1900Loncosaurus Ameghino p. 216
1900Loncosaurus argentinus Ameghino p. 216
1900Sphenospondylus Nopcsa p. 557
1900Loncosaurus argentinus Roth p. 227
1900Vectisaurus valdensis Van Den Broeck p. 86
1900Sphenospondylus Van Den Broeck p. 87
1900Sphenospondylus gracilis Van Den Broeck p. 87
1901Loncosaurus Nopcsa p. 199
1901Loncosaurus argentinus Nopcsa p. 200
1901Tichosteus Nopcsa p. 207
1901Tichosteus lucasanus Nopcsa p. 207
1901Iguanodon exogirarum Nopcsa p. 211
1901Anoplosaurus major Nopcsa p. 213
1901Sphenospondylus Nopcsa p. 213
1901Sphenospondylus gracilis Nopcsa p. 213
1901Euceracosaurus Nopcsa p. 214
1901Euceracosaurus tanyspondylus Nopcsa p. 214
1901Syngonosaurus Nopcsa p. 216
1901Vectisaurus Nopcsa p. 216
1901Vectisaurus valdensis Nopcsa p. 216
1902Tichosteus Hay p. 493
1902Tichosteus aequifacies Hay p. 493
1902Tichosteus lucasanus Hay p. 493
1902Syngonosaurus Nopcsa p. 101
1902Acanthopholis major Nopcsa p. 102
1902Iguanodon exogirarum Nopcsa p. 151
1904Anoplosaurus major Lydekker p. 61
1904Eucercosaurus tanyspondylus Lydekker p. 61
1905Albisaurus Fritsch p. 5
1905Albisaurus scutifer Fritsch p. 5
1905Procerosaurus exogirarum Fritsch p. 5
1905Albisaurus Fritsch p. 29
1905Procerosaurus exogirarum Fritsch p. 29 figs. 30; Pl. 8:9
1905Albisaurus Fritsch p. 30 fig. 31
1905Albisaurus scutifer Fritsch p. 30 fig. 31
1906Loncosaurus Ameghino p. 61
1906Loncosaurus argentinus Ameghino p. 62
1909Tichosteus Huene p. 13
1909Loncosaurus Huene p. 15
1909Eucercosaurus Huene p. 17
1909Sphenospondylus Huene p. 17
1909Syngonosaurus Huene p. 17
1909Vectisaurus Huene p. 17
1911Loncosaurus von Zittel p. 281
1911Sphenospondylus von Zittel p. 292
1911Uestisaurus von Zittel p. 294
1911Eucerosaurus von Zittel p. 295
1911Syngonosaurus von Zittel p. 295
1912Iguanodontia Lull p. 210
1914Procerosaurus exogyrarum Bayer p. 2–3
1915Anoplosaurus major Hennig p. 13
1916Procerosaurus exogyrarum Bayer p. 41
1916Tichosteus aequifacies Mook p. 142
1916Tichosteus lucasanus Mook p. 142
1919Tichosteus Osborn and Mook p. 390
1919Tichosteus aequifacies Osborn and Mook p. 390
1919Tichosteus lucasanus Osborn and Mook p. 390
1923Anoplosaurus major Nopcsa p. 193
1927Loncosaurus Huene p. 256
1927Loncosaurus argentinus Huene p. 256
1927Albisaurus Huene p. 269
1927Albisaurus scutifer Huene p. 269
1927Anoplosaurus major Huene p. 271
1927Eucercosaurus Huene p. 271
1927Eucercosaurus tanyspondylus Huene p. 271
1927Syngonosaurus Huene p. 271
1928Syngonosaurus Nopcsa p. 184
1929Loncosaurus argentinus Huene p. 139
1929Loncosaurus Huene p. 146
1930Tichosteus Hay p. 186
1930Tichosteus aequifacies Hay p. 186
1930Tichosteus lucasanus Hay p. 187
1931Loncosaurus argentinus Huene p. 196
1932Fulgurotherium Huene pp. 69-70 figs. Pl. 3:11
1934Loncosaurus Huene p. 19
1934Syngonosaurus Stromer p. 66
1936Vectisaurus Swinton p. 216
1936Vectisaurus valdensis Swinton p. 216
1939Tichosteus Kuhn p. 37
1939Tichosteus aequifacies Kuhn p. 37
1939Tichosteus lucasanus Kuhn p. 37
1939Loncosaurus Kuhn p. 55
1939Loncosaurus argentinus Kuhn p. 55
1939Fulgurotherium Kuhn p. 56
1944Fulgurotherium Huene p. 449
1956Tichosteus Romer p. 618
1956Vectisaurus Romer p. 629
1964Anoplosaurus major Kuhn p. 8
1964Sphenospondylus Kuhn p. 10
1964Iguanodon exogirarum Kuhn p. 11
1964Sphenospondylus gracilis Kuhn p. 13
1964Vectisaurus Kuhn p. 13
1964Vectisaurus valdensis Kuhn p. 13
1964Eucercosaurus Kuhn p. 40
1964Eucercosaurus tanyspondylus Kuhn p. 40
1964Sygmosaurus Kuhn p. 41
1964Albisaurus Kuhn p. 45
1964Albisaurus scutifer Kuhn p. 46
1964Fulgurotherium Tatarinov p. 533
1964Tichosteus Tatarinov p. 540
1964Eucercosaurus Tatarinov p. 559
1964Syngonosaurus Tatarinov p. 559
1964Vectisaurus Tatarinov p. 559
1966Tichosteus Romer p. 370
1966Vectisaurus Romer p. 370
1970Tichosteus Steel p. 45
1970Tichosteus aequifacies Steel p. 45
1970Tichosteus lucasanus Steel p. 45
1971Vectisaurus Galton p. 42
1974Vectisaurus Thulborn p. 172
1975Vectisaurus Galton p. 748
1975Vectisaurus valdensis Galton p. 748
1976Vectisaurus Galton pp. 976, 982-3
1976Vectisaurus valdensis Galton pp. 982-983
1978Loncosaurus Bonaparte p. 322
1978Loncosaurus argentinus Bonaparte p. 552
1979Loncosaurus argentinus Bonaparte p. 233
1979Iguanodon ottingeri Galton and Jensen p. 3 figs. 2-3
1980Fulgurotherium Molnar p. 134
1980Vectisaurus Molnar p. 137
1980Loncosaurus Molnar p. 139
1981Eucercosaurus Bartholomai and Molnar p. 343
1981Eucercosaurus tanyspondylus Bartholomai and Molnar p. 343
1981Iguanodon gracilis Bartholomai and Molnar p. 343
1981Iguanodon ottingeri Bartholomai and Molnar p. 343
1981Vectisaurus Bartholomai and Molnar p. 343
1981Vectisaurus valdensis Bartholomai and Molnar p. 343
1983Iguanodon ottingeri Weishampel and Weishampel p. 44
1983Vectisaurus Weishampel and Weishampel p. 44
1983Vectisaurus valdensis Weishampel and Weishampel p. 44
1984Vectisaurus Milner and Norman p. 146
1984Fulgurotherium Molnar pp. 153-154
1984Loncosaurus Molnar p. 154
1984Loncosaurus argentinus Molnar p. 154
1984Iguanodontia Russell p. 29
1985Iguanodontia Cooper p. 286
1986Fulgurotherium Molnar and Galton pp. 237-238
1986Iguanodontia Sereno
1988Albisaurus albinus Brinkmann pp. 125-126
1988Fulgurotherium Carroll
1988Vectisaurus Carroll
1989Bihariosaurus Marinescu pp. 129-131 figs. 5-14
1989Bihariosaurus bauxiticus Marinescu pp. 129-131 figs. 5-14
1989Iguanodontia Norman p. 61 fig. 1
1989Fulgurotherium Rich and Vickers-Rich p. 35
1990Iguanodontia Benton p. 19
1990Fulgurotherium Sues and Norman p. 500
1991Fulgurotherium Molnar p. 650
1992Fulgurotherium Molnar p. 265
1992Iguanodontia Weishampel and Heinrich p. 163
1997Iguanodon ottingeri Kirkland p. 98
1997Loncosaurus Novas p. 684
1997Loncosaurus argentinus Novas p. 684
1997Iguanodontia Sereno p. 443
1997Fulgurotherium Sues p. 357
1998Iguanodontia Godefroit et al. p. 7
1998Iguanodontia Sereno p. 61
1999Loncosaurus Coria p. 53
1999Iguanodon ottingeri Kirkland et al. p. 204
1999Iguanodontia Sereno p. 2138 fig. 2
2000Iguanodontia Norman and Sues p. 463
2000Ponerosteus exogyrarum Olshevsky p. 127
2002Iguanodontia Buchholz p. 21
2003Vectisaurus Grigorescu p. 99
2004Iguanodontia Norman p. 432
2004Fulgurotherium Norman et al. p. 394
2004Iguanodontia Novas et al.
2005Iguanodon ottingeri Swanson et al. p. 32
2006Iguanodontia Sachs and Hornung p. 423
2007Iguanodontia Galton p. 38
2007Iguanodontia Sánchez-Hernández et al. p. 203
2008Iguanodontia Butler et al. p. 21 figs. 2-4
2009Iguanodontia Galton p. 215
2009Fulgurotherium Galton p. 225
2011Iguanodontia Shibata et al. p. 970
2012Iguanodontia Han et al. p. 1391 fig. 14
2014Fulgurotherium Alifanov and Saveliev p. 419
2014Iguanodontia Escaso et al. p. 1103
2014Iguanodontia Norman p. 37 fig. 2.30
2015Iguanodontia Gasulla et al.
2015Iguanodontia Shibata et al.
2017Iguanodontia Wang et al.
2018Iguanodontia Madzia et al. p. 973 fig. 4
2018Iguanodontia Xu et al.
2019Iguanodontia Herne et al. p. 575
2019Iguanodontia Ibiricu et al.
2019Iguanodontia Prieto-Márquez et al.
2020Iguanodontia Dieudonné et al.
2021Iguanodontia Verdú et al. p. 10
2024Iguanodontia Fonseca et al.
2025Iguanodontia Bertozzo et al.
2025Iguanodontia Sancarlo et al.
2026Iguanodontia Huang et al.
2026Iguanodontia Magyar et al.
2026Iguanodontia Yao et al.

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
classOsteichthyes
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
subclassEureptilia()
RankNameAuthor
—Romeriida
—Diapsida()
—Archosauromorpha(Huene 1946)
—Crocopoda
—ArchosauriformesGauthier 1986
—Eucrocopoda
—Archosauria()
informalAvemetatarsalia
—Ornithodira
—Dinosauromorpha
—Dinosauriformes
—Dinosauria()
—Ornithischia()
—Neornithischia()
—Pyrodontia
—Cerapoda
suborderOrnithopoda
infraorderIguanodontia
infraorderIguanodontia

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.

Infraor. †Iguanodontia Baur 1891
show all | hide all
G. †Choyrodon Gates et al. 2018
+
†Choyrodon barsboldi Gates et al. 2018
Unr. †Euiguanodontia Coria and Salgado 1996
+
G. †Callovosaurus Galton 1980
+
†Callovosaurus leedsi Lydekker 1889
Unr. †Dryomorpha Sereno 1986
+
Unr. †Ankylopollexia Sereno 1986
+
G. †Bayannurosaurus Xu et al. 2018
+
†Bayannurosaurus perfectus Xu et al. 2018
Fm. †Camptosauridae Marsh 1885 [camptosaurid]
+
Invalid names: Camptonotidae Marsh 1881 [synonym]
G. †Camptosaurus Marsh 1885
+
†Camptosaurus aphanoecetes Carpenter and Wilson 2008
†Camptosaurus dispar Marsh 1879
+
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
+
†Iguanodon bernissartensis Boulenger 1881
+
Invalid names: Iguanodon seelyi Hulke 1882 [synonym]
†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
+
G. †Altirhinus Norman 1998
Unr. †Hadrosauromorpha Norman 2014
G. †Hypselospinus Norman 2010
+
Invalid names: Darwinsaurus Paul 2012 [synonym], Wadhurstia Carpenter and Ishida 2010 [objective synonym]
Fm. †Iguanodontidae Bonaparte 1850 [iguanodontid]
+
Invalid names: Ornithopodidae Zittel 1895 [synonym]
G. †Ouranosaurus Taquet 1972
Unr. †Styracosterna Sereno 1986
+
G. †Calvarius Prieto-Márquez and Sellés 2023
G. †Cumnoria Seeley 1888
G. †Dakotadon Paul 2008
G. †Delapparentia Ruiz-Omeñaca 2011
Unr. †Hadrosauriformes Sereno 1997
G. †Hippodraco McDonald et al. 2010
G. †Iguanacolossus McDonald et al. 2010
G. †Istiorachis Lockwood et al. 2025
G. †Lanzhousaurus You et al. 2005
G. †Magnamanus Fuentes Vidarte et al. 2016
G. †Napaisaurus Ji and Zhang 2022
G. †Paulodon Sancarlo et al. 2025
G. †Riabininohadros Ulansky 2015
G. †Theiophytalia Brill and Carpenter 2007
G. †Draconyx Mateus and Antunes 2001
+
†Draconyx loureiroi Mateus and Antunes 2001
Fm. †Dryosauridae Milner and Norman 1984
+
G. †Dinehichnus Lockley et al. 1998
+
†Dinehichnus socialis Lockley et al. 1998
G. †Dryosaurus Marsh 1894
+
†Dryosaurus altus Marsh 1878
†Dryosaurus elderae Carpenter and Galton 2018
G. †Dysalotosaurus Virchow 1919
+
G. †Elrhazosaurus Galton 2009
+
†Elrhazosaurus nigeriensis Galton and Taquet 1982
G. †Eousdryosaurus Escaso et al. 2014
+
†Eousdryosaurus nanohallucis Escaso et al. 2014
G. †Valdosaurus Galton 1977
+
G. †Hesperonyx Rotatori et al. 2024
+
†Hesperonyx martinhotomasorum Rotatori et al. 2024
G. †Oblitosaurus Sánchez-Fenollosa et al. 2023
+
†Oblitosaurus bunnueli Sánchez-Fenollosa et al. 2023
G. †Owenodon Galton 2009
+
†Owenodon hoggii Owen 1874
Invalid names: Dryosauroidea Norman 1984 [empty]
Unr. †Elasmaria Calvo et al. 2007
+
G. †Anabisetia Coria and Calvo 2002
+
†Anabisetia saldiviai Coria and Calvo 2002
G. †Atlascopcosaurus Rich and Vickers-Rich 1989
+
†Atlascopcosaurus loadsi Rich and Vickers-Rich 1989
G. †Chakisaurus Nogueira et al. 2024
+
†Chakisaurus nekul Nogueira et al. 2024
G. †Diluvicursor Herne et al. 2018
+
†Diluvicursor pickeringi Herne et al. 2018
G. †Fostoria Bell et al. 2019
+
†Fostoria dhimbangunmal Bell et al. 2019
G. †Galleonosaurus Herne et al. 2019
+
†Galleonosaurus dorisae Herne et al. 2019
G. †Gasparinisaura Coria and Salgado 1996
+
†Gasparinisaura cincosaltensis Coria and Salgado 1996
G. †Isasicursor Novas et al. 2019
+
†Isasicursor santacrucensis Novas et al. 2019
G. †Kangnasaurus Haughton 1915
+
†Kangnasaurus coetzeei Haughton 1915
G. †Leaellynasaura Rich and Vickers-Rich 1989
+
†Leaellynasaura amicagraphica Rich and Vickers-Rich 1989
G. †Macrogryphosaurus Calvo et al. 2007
+
†Macrogryphosaurus gondwanicus Calvo et al. 2007
G. †Mahuidacursor Cruzado-Caballero et al. 2019
+
†Mahuidacursor lipanglef Cruzado-Caballero et al. 2019
G. †Morrosaurus Rozadilla et al. 2016
+
†Morrosaurus antarcticus Rozadilla et al. 2016
G. †Muttaburrasaurus Bartholomai and Molnar 1981
+
†Muttaburrasaurus langdoni Bartholomai and Molnar 1981
G. †Notohypsilophodon Martínez 1998
+
G. †Qantassaurus Rich and Vickers-Rich 1999
+
†Qantassaurus intrepidus Rich and Vickers-Rich 1999
G. †Sektensaurus Ibiricu et al. 2019
+
†Sektensaurus sanjuanboscoi Ibiricu et al. 2019
G. †Talenkauen Novas et al. 2004
+
†Talenkauen santacrucensis Novas et al. 2004
G. †Tietasaura Bandeira et al. 2024
+
†Tietasaura derbyiana Bandeira et al. 2024
G. †Trinisaura Coria et al. 2013
+
†Trinisaura santamartaensis Coria et al. 2013
G. †Weewarrasaurus Bell et al. 2018
+
†Weewarrasaurus pobeni Bell et al. 2018
G. †Iyuku Forster et al. 2022
+
†Iyuku raathi Forster et al. 2022
Superfm. †Iguanodontoidea Hay 1902
+
G. †Craspedodon Dollo 1883
+
†Craspedodon lonzeensis Dollo 1883
G. †Lurdusaurus Taquet and Russell 1999
+
†Lurdusaurus arenatus Taquet and Russell 1999
+
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
+
+
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]
G. †Osmakasaurus McDonald 2011
+
†Osmakasaurus depressus Gilmore 1909
G. †Planicoxa DiCroce and Carpenter 2001
+
†Planicoxa venenica DiCroce and Carpenter 2001
Unr. †Rhabdodontomorpha Dieudonné et al. 2016
+
G. †Ampelognathus Tykoski et al. 2023
+
†Ampelognathus coheni Tykoski et al. 2023
G. †Emiliasaura Coria et al. 2024
+
†Emiliasaura alessandrii Coria et al. 2024
G. †Obelignathus Czepiński and Madzia 2025
+
†Obelignathus septimanicus Buffetaut and Le Loeuff 1991
Unr. †Rhabdodontia Dieudonné et al. 2026
+
G. †Foskeia Dieudonné et al. 2026
+
†Foskeia pelendonum Dieudonné et al. 2026
Unr. †Rhabdodontoidea Poole 2022
+
G. †Matheronodon Godefroit et al. 2017
+
†Matheronodon provincialis Godefroit et al. 2017
G. †Mochlodon Seeley 1881
+
†Mochlodon priscus Matheron 1869
†Mochlodon vorosi Osi et al. 2012
†Rhabdodon suessi Bunzel 1871
G. †Pareisactus Párraga and Prieto-Márquez 2019
+
†Pareisactus evrostos Párraga and Prieto-Márquez 2019
Fm. †Rhabdodontidae Weishampel et al. 2003 [rhabdodontid]
+
G. †Rhabdodon Matheron 1869
+
†Rhabdodon priscus Matheron 1869
+
Invalid names: Oligosaurus adelus Seeley 1881 [synonym], Ornithomerus gracilis Seeley 1881 [synonym]
Invalid names: Oligosaurus Seeley 1881 [synonym], Ornithomerus Seeley 1881 [synonym]
G. †Zalmoxes Weishampel et al. 2003
+
†Zalmoxes robustus Nopcsa 1900
+
Invalid names: Camptosaurus inkeyi Nopcsa 1900 [synonym], Onychosaurus hungaricus Nopcsa 1902 [synonym]
Invalid names: Onychosaurus Nopcsa 1902 [synonym]
Fm. †Tenontosauridae Fonseca et al. 2024
+
G. †Convolosaurus Andrzejewski et al. 2019
+
†Convolosaurus marri Andrzejewski et al. 2019
G. †Iani Zanno et al. 2023
+
†Iani smithi Zanno et al. 2023
G. †Tenontosaurus Ostrom 1970
+
†Tenontosaurus dossi Winkler et al. 1997
†Tenontosaurus tilletti Ostrom 1970
G. †Transylvanosaurus Augustin et al. 2022
+
†Transylvanosaurus platycephalus Augustin et al. 2022
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]
Diagnosis
ReferenceDiagnosis
D. B. Weishampel and R. E. Heinrich 19921) eversion of the oral margin of the premaxilla [1],
2) enlarged external nares relative to the orbit [2],
3) circular or ovate antorbital fossa [6; also found in Parksosaurus],
4) relatively small external antorbital opening [7; also found in Parksosaurus],
5) denticulate oral margin of the predentary [17],
6) paired ventral process of predentary [18],
7) parallel dorsal and ventral margins of the dentary [19],
8) loss of premaxillary teeth [20],
9) humeral length less than scapular length [28],
10) loss of phalanx from manual digit II [30],
1 1) deep cranial intercondylar groove on the distal femur [37].
Measurements
No measurements are available
Composition: hydroxyapatiteo
Entire body: yeso
Adult length: 10 to < 100o
Adult width: 1.0 to < 10o
Adult height: 1.0 to < 10o
Maximum body mass: 10000 kgg
Minimum body mass: 3 kgg
Architecture: compact or denseo
Ontogeny: accretion, modification of partso
Grouping: gregariouso
Environment: terrestrialo
Locomotion: actively mobileo
Life habit: ground dwellingo
Diet: herbivoresubo
Reproduction: oviparouso
Dispersal: direct/internalo
Dispersal 2: mobileo
Created: 2009-01-03 20:40:05
Modified: 2009-01-04 04:40:05
Source: g = genus, subo = suborder, o = order
References: Kiessling 2004, Marsh 1875, Peczkis 1995, Benton 1983

Age range: base of the Early/Lower Jurassic to the top of the Maastrichtian or 201.40000 to 66.00000 Ma

Collections (2411 total)

Oldest occurrences

Time interval Ma Country or state Original ID and collection number
Early/Lower Jurassic201.4 - 174.7China (Gansu) Iguanodontidae indet. (131877)
Aalenian - Bajocian174.7 - 168.2China (Sichuan) Trachodontidae indet. (140257)
Early/Lower Bajocian - Early/Lower Bathonian170.9 - 165.3Mexico (Oaxaca) Ornithopoda indet. (36267)
Middle Callovian165.3 - 161.5Germany (Nordrhein-Westfalen) Dryosauridae indet. (67698)
Middle Callovian165.3 - 161.5United Kingdom (England) Camptosaurus leedsi (59128) Reptilia indet. (109800)
Oxfordian161.5 - 154.8Chile (Tarapaca) Camptosauridae indet. (170681)
Late/Upper Jurassic161.5 - 143.1USA (Wyoming) Dryomorpha indet. (62561)
Late/Upper Jurassic161.5 - 143.1China (Shanxi) Iguanodontidae indet. (55297)
Late/Upper Jurassic161.5 - 143.1China (Yunnan) Dinehichnus sp. (229403)
Late/Upper Jurassic - Early/Lower Cretaceous161.5 - 100.5Japan (Yamaguchi) Iguanodontidae indet. (166075)

Youngest occurrences
Time interval Ma Country or state PBDB collection number
Maastrichtian72.2 - 66.0China (Shaanxi) Shantungosaurus giganteus (178689)
Maastrichtian72.2 - 66.0USA (New Jersey) Hadrosauridae indet. (78124 129265 167631 167741 167746) Hadrosauridae indet., Hadrosaurus minor (53054) Hadrosaurus cavatus (53122) Hadrosaurus sp. (57915)
Maastrichtian72.2 - 66.0China (Gansu) Hadrosauridae indet. (178686)
Maastrichtian72.2 - 66.0USA (Montana) Anatosaurus annectens (48836 55385) Anatosaurus sp. (49016 57914) Claosaurus sp. (57765 142376) Edmontosaurus sp. (50088) Hadrosauridae indet. (12977 85498 85499 167433 167436 167437) Thespesius sp. (83299) Trachodon sp. (74009 142493)
Maastrichtian72.2 - 66.0Canada (Alberta) Hadrosauridae indet. (52659 276665 276666) Hypacrosaurus altispinus (45677 45678) Saurolophus sp. (276661 276664) Trachodon marginatus (45676)
Maastrichtian72.2 - 66.0USA (South Dakota) Hadrosauridae indet. (74175) Hadrosaurinae indet. (45392)
Maastrichtian72.2 - 66.0USA (Wyoming) Camptosauridae indet. (165881)
Maastrichtian - Early/Lower Maastrichtian72.2 - 66.0Argentina (Río Negro) Hadrosauridae indet. (49557 96099 96100 96111 219386 219583) Hadrosauroidea indet. (37039) Iguanodontidae indet. (95694) Lambeosaurinae indet., Saurolophinae indet. (32370) Spheroolithidae indet. (52910)
Maastrichtian - Early/Lower Maastrichtian72.2 - 66.0Argentina (La Pampa) Hadrosaurinae indet. (48829)
Late/Upper Maastrichtian - Danian72.2 - 61.66Slovenia (Obalno-Kraska) Iguanodontidae indet., Hadrosauridae indet. (67198)