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Romeriida

Reptilia

Taxonomy
Romeriida was named by Gauthier et al. (1988). It is extant. It was considered monophyletic by Laurin and Reisz (1995).

It was assigned to Reptilia by Gauthier et al. (1988) and Gauthier et al. (1989); and to Eureptilia by Laurin and Reisz (1995).

Subtaxa

Synonymy list
YearName and author
1988Romeriida Gauthier et al. p. 139 fig. 4.4
1989Romeriida Gauthier et al. p. 343
1995Romeriida Laurin and Reisz p. 172 fig. 2

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
RankNameAuthor
Tetrapoda
Reptiliomorpha
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
Sauropsida
classReptilia
subclassEureptilia()
Romeriida
Romeriida

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. Romeriida Gauthier et al. 1988
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Unr. Diapsida Osborn 1903 [diapsid]
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G. †Adelosaurus Watson 1914
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Adelosaurus huxleyi Hancock and Howse 1870
Unr. †Araeoscelidia Williston 1913
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Fm. †Araeoscelidae Williston 1910
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G. †Araeoscelis Williston 1910
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Araeoscelis casei Broom 1913
Araeoscelis gracilis Williston 1910
Invalid names: Ophiodeirus Broom 1913 [synonym]
G. †Kadaliosaurus Credner 1889
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Kadaliosaurus priscus Credner 1889
G. †Zarcasaurus Brinkman et al. 1984
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Zarcasaurus tanyderus Brinkman et al. 1984
Invalid names: Kadaliosauridae Williston 1912 [synonym]
G. †Halgaitosaurus Henrici et al. 2023
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Halgaitosaurus gregarius Henrici et al. 2023
Fm. †Petrolacosauridae Peabody 1952
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G. †Petrolacosaurus Lane 1945
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Invalid names: Podargosaurus hibbardi Lane 1945 [synonym]
Invalid names: Podargosaurus Lane 1945 [synonym]
G. †Spinoaequalis deBraga and Reisz 1995
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Spinoaequalis schultzei deBraga and Reisz 1995
Unr. †Archelosauria Crawford 2015
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Invalid names: Sauropterygomorpha Wolniewicz et al. 2023 [empty]
Unr. Archosauromorpha Huene 1946 [archosauromorph]
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G. †Aenigmastropheus Ezcurra et al. 2014
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Aenigmastropheus parringtoni Ezcurra et al. 2014
G. †Arctosaurus Adams 1875
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Arctosaurus osborni Adams 1875
Unr. †Crocopoda Ezcurra 2016
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Unr. †Allokotosauria Nesbitt et al. 2015
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Fm. †Azendohsauridae Nesbitt et al. 2015
G. †Coelodontognathus Ochev 1967
G. †Pamelaria Sen 2003
G. †Trilophosaurus Case 1928
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Invalid names: Chinleogomphius Sues and Olsen 1993 [synonym]
Unr. †Archosauriformes Gauthier 1986
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G. †Antarctanax Peecook et al. 2019
G. †Barberenasuchus Mattar 1987
G. †Chasmatosuchus Huene 1940
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Invalid names: Gamosaurus Ochev 1979 [synonym], Jaikosuchus Sennikov 1990 [synonym]
G. †Collilongus Borsuk−Białynicka and Sennikov 2009
G. †Crosbysaurus Heckert 2004
Unr. †Crurotarsi Sereno and Arcucci 1990
G. †Cuyosuchus Reig 1961
G. †Dyoplax Fraas 1867
Fm. †Erythrosuchidae Watson 1917
Unr. †Eucrocopoda Ezcurra 2016
Fm. †Euparkeriidae Huene 1920
G. †Fugusuchus Cheng 1980
G. †Graoullyodon Godefroit and Cuny 1997
G. †Heteropelta Dalla Vecchia 2021
G. †Incertovenator Yanez et al. 2021
G. †Kalisuchus Thulborn 1979
G. †Litorosuchus Li et al. 2016
G. †Lucianosaurus Hunt and Lucas 1993
G. †Marcianosuchus Sues et al. 2024
G. †Protecovasaurus Heckert 2004
Fm. †Proterosuchidae Broom 1906
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Invalid names: Chasmatosauridae Haughton 1924 [synonym], Garjainiidae Ochev 1958 [synonym], Vjushkoviidae Huene 1960 [synonym]
Unr. †Protopyknosia Nesbitt et al. 2021
G. †Sarmatosuchus Sennikov 1994
G. †Syntomiprosopus Heckert et al. 2021
G. †Tecovasaurus Hunt and Lucas 1994
G. †Triopticus Stocker et al. 2016
G. †Uatchitodon Sues 1991
G. †Vonhuenia Sennikov 1992
G. †Zanclodon Plieninger 1846
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Invalid names: Smilodon Plieninger 1846 [replaced]
Invalid names: Erythrosuchia Bonaparte 1984 [empty], Plateosaurus ornatus Huene 1905 [nomen dubium], Typothorax punctulatus Rusconi 1947 [nomen dubium], Wangisuchus Young 1964 [nomen dubium], Wangisuchus tzeyii Young 1964 [nomen dubium]
G. †Boreopricea Tatarinov 1978
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Boreopricea funerea Tatarinov 1978
G. †Eorasaurus Sennikov 1997
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Eorasaurus olsoni Sennikov 1997
Fm. †Prolacertidae Parrington 1935
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G. †Kadimakara Bartholomai 1979
G. †Malutinisuchus Ochev 1986
G. †Prolacerta Parrington 1935
G. †Vritramimosaurus Sennikov 2005
G. †Prolacertoides Young 1973
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Unr. †Rhynchosauria Osborn 1903 [rhynchosaur]
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G. †Eohyosaurus Butler et al. 2015
G. †Howesia Broom 1905
Subor. †Mesosuchidia Haughton 1924
G. †Mesosuchus Watson 1912
G. †Noteosuchus Broom 1925
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Invalid names: Eosuchus Watson 1912 [replaced]
Unr. †Rhynchosauridae Cope 1871
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Invalid names: Scaphonychidae Huene 1948 [synonym]
Subor. †Rhynchosauroidea Nopcsa 1928
Invalid names: Gnathodontia Owen 1859 [synonym], Hyperodapedontidae Lydekker 1885 [empty]
G. †Tasmaniosaurus Camp and Banks 1978
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Tasmaniosaurus triassicus Camp and Banks 1978
Invalid names: Ankistrodon Huxley 1865 [nomen dubium], Ankistrodon indicus Huxley 1865 [nomen dubium], Blomia Sennikov 1992 [nomen dubium], Blomia georgii Sennikov 1992 [nomen dubium], Tsylmosuchus Sennikov 1990 [nomen dubium], Tsylmosuchus donensis Sennikov 1990 [nomen dubium], Tsylmosuchus jakovlevi Sennikov 1990 [nomen dubium]
G. †Czatkowiella Borsuk−Białynicka and Evans 2009
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Czatkowiella harae Borsuk−Białynicka and Evans 2009
G. †Elessaurus De-Oliveira et al. 2020
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Elessaurus gondwanoccidens De-Oliveira et al. 2020
Superfm. †Helveticosauroidea Rieppel 1989
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Fm. †Helveticosauridae Peyer 1955
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G. †Eusaurosphargis Nosotti and Rieppel 2003
G. †Helveticosaurus Peyer 1955
G. †Jesairosaurus Jalil 1997
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Jesairosaurus lehmani Jalil 1997
G. †Mecistotrachelos Fraser et al. 2007
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Mecistotrachelos apeoros Fraser et al. 2007
Unr. †Prolacertiformes Camp 1945
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G. †Cosesaurus Ellenberger and Villalta 1974
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Cosesaurus aviceps Ellenberger and Villalta 1974
Fm. †Podopterygidae Sharov 1971
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G. †Sharovipteryx Cowen 1981
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Invalid names: Podopteryx Sharov 1971 [replaced]
G. †Rhombopholis Owen 1866
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Or. †Protorosauria Huxley 1871
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G. †Fuyuansaurus Fraser et al. 2013
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Fuyuansaurus acutirostris Fraser et al. 2013
G. †Pectodens Li et al. 2017
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Pectodens zhenyuensis Li et al. 2017
Fm. †Protorosauridae Cope 1871
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G. †Aphelosaurus Gervais 1858
G. †Malerisaurus Chatterjee 1980
G. †Microcnemus Huene 1940
G. †Tridentinosaurus Dal Piaz 1931
Invalid names: Thecodontosaurus primus Huene 1905 [nomen dubium]
Fm. †Sharovipterygidae Tatarinov 1989
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G. †Ozimek Dzik and Sulej 2016
Invalid names: Proterosauria Seeley 1887 [synonym]
G. †Protorosaurus Meyer 1830
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Protorosaurus speneri Meyer 1832
Fm. †Tanystropheidae Gervais 1859
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G. †Amotosaurus Fraser and Rieppel 2006
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Amotosaurus rotfeldensis Fraser and Rieppel 2006
G. †Augustaburiania Sennikov 2011
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Augustaburiania vatagini Sennikov 2011
G. †Dinocephalosaurus Li 2003
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G. †Langobardisaurus Renesto 1994
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Invalid names: Langobardisaurus rossii Bizzarini and Muscio 1995 [nomen dubium]
G. †Macrocnemus Nopcsa 1930
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Macrocnemus anatinus Huene 1944
Macrocnemus bassanii Nopcsa 1930
Macrocnemus fuyuanensis Li et al. 2007
Macrocnemus obristi Fraser and Furrer 2013
G. †Protanystropheus Sennikov 2011
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G. †Raibliania Dalla Vecchia 2020
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Raibliania calligarisi Dalla Vecchia 2020
G. †Sclerostropheus Spiekman and Scheyer 2019
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G. †Tanystropheus von Meyer 1852
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Tanystropheus biharicus Jurcsák 1975
Tanystropheus haasi Rieppel 2001
Tanystropheus hydroides Spiekman et al. 2020
Invalid names: Chelyzoon Huene 1902 [nomen dubium], Chelyzoon blezingeri Huene 1902 [nomen dubium], Chelyzoon latum Huene 1902 [nomen dubium], Macroscelosaurus Münster 1852 [synonym], Nothosaurus blezingeri Fraas 1896 [nomen dubium], Pectenosaurus Huene 1902 [synonym], Procerosaurus Huene 1902 [synonym], Tanystrophaeus posthumus Huene 1908 [nomen dubium], Tribelesodon Bassani 1886 [synonym]
G. †Tanytrachelos Olsen 1979
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Tanytrachelos ahynis Olsen 1979
Invalid names: Macroscelosauridae Kuhn 1935 [synonym], Tribelesodontidae Nopcsa 1923 [synonym]
Unr. †Teraterpetidae Sues 2003
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G. †Teraterpeton Sues 2003
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G. †Teyujagua Pinheiro et al. 2016
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Teyujagua paradoxa Pinheiro et al. 2016
Fm. †Trilophosauridae Gregory 1945
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G. †Spinosuchus Huene 1932
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Spinosuchus caseanus Huene 1932
G. †Tricuspisaurus Robinson 1957
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Tricuspisaurus thomasi Robinson 1957
G. †Variodens Robinson 1957
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Variodens inopinatus Robinson 1957
Invalid names: Chasmatosuchus vjushkovi Ochev 1961 [nomen dubium], Exilisuchus Ochev 1979 [nomen dubium], Exilisuchus tubercularis Ochev 1979 [nomen dubium], Gwyneddosaurus Bock 1945 [nomen dubium], Megalancosauridae Olshevsky 1991 [empty], Ocolurtaia Rusconi 1947 [nomen dubium], Ocolurtaia arquata Rusconi 1947 [nomen dubium], Rhabdopelix longispinis Cope 1866 [nomen dubium]
G. †Dolerosaurus Butler 2013
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Dolerosaurus trauthi Huene 1939
Unr. †Drepanosauromorpha Renesto et al. 2010
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G. †Ancistronychus Gonçalves and Sidor 2019
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Ancistronychus paradoxus Gonçalves and Sidor 2019
Fm. †Drepanosauridae Berman and Reisz 1992
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G. †Avicranium Pritchard and Nesbitt 2017
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Avicranium renestoi Pritchard and Nesbitt 2017
G. †Dolabrosaurus Berman and Reisz 1992
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Dolabrosaurus aquatilis Berman and Reisz 1992
G. †Kyrgyzsaurus Alifanov and Kurochkin 2011
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Kyrgyzsaurus bukhanchenkoi Alifanov and Kurochkin 2011
Unr. †Megalancosaurinae Renesto et al. 2010
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G. †Drepanosaurus Pinna 1980
G. †Megalancosaurus Calzavara et al. 1981
G. †Skybalonyx Jenkins et al. 2021
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Skybalonyx skapter Jenkins et al. 2021
G. †Unguinychus Pugh et al. 2024
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Unguinychus onyx Pugh et al. 2024
Unr. †Elyurosauria Renesto et al. 2010
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G. †Vallesaurus Renesto and Binelli 2006
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Vallesaurus cenensis Renesto and Binelli 2006
Vallesaurus zorzinensis Renesto et al. 2010
G. †Hypuronector Colbert and Olsen 2001
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Hypuronector limnaios Colbert and Olsen 2001
Unr. Eosuchia Broom 1914
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G. †Aenigmasaurus Parrington 1953
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Aenigmasaurus grallator Parrington 1953
Unr. †Avicephala Senter 2004
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G. †Coelurosauravus Piveteau 1926
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Coelurosauravus elivensis Piveteau 1926
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Invalid names: Daedalosaurus madagascariensis Carroll 1978 [synonym]
Invalid names: Daedalosaurus Carroll 1978 [synonym], Gracilisaurus Weigelt 1930 [synonym]
G. †Longisquama Sharov 1970
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Longisquama insignis Sharov 1970
Invalid names: Simiosauria Senter 2004 [empty]
Fm. †Heleosauridae Haughton 1924
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G. †Heleophilus Broom 1909
G. †Heleosuchus Broom 1913
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Unr. Neodiapsida Benton 1985
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G. †Acallosuchus Long and Murry 1995
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Acallosuchus rectori Long and Murry 1995
Fm. †Claudiosauridae Carroll 1981
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G. †Claudiosaurus Carroll 1981
Unr. †Euryapsida Colbert 1945
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Or. †Araeosceloidea Nopcsa 1928
Invalid names: Synaptosauria Williston 1925 [synonym]
G. †Galesphyrus Broom 1914
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Galesphyrus capensis Broom 1914
G. †Lacertulus Carroll and Thompson 1982
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Lacertulus bipes Carroll and Thompson 1982
G. †Orovenator Reisz et al. 2011
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Orovenator mayorum Reisz et al. 2011
G. †Palaeagama Broom 1926
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Palaeagama vielhaueri Broom 1926
Subor. Sauria MacCartney 1802
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Or. Autosauri Haeckel
Infraor. †Eolacertilia Robinson 1967
Subor. Iguaniformes Hay 1930
G. †Lacertipus Haubold 1971
Invalid names: Ascalabota Gilmore 1928 [invalid subgroup], Geckonidi Perrier 1928 [empty], Labyrinthodontidae d'Orbigny 1849 [empty], Lacertidi Perrier 1928 [empty], Mosasauriformes Hay 1930 [empty], Saurii Latreille 1800 [synonym], Vermilinguii Perrier 1928 [empty]
Unr. Sauria Gauthier 1984 [crown diapsid]
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G. †Antarcticoolithus Legendre et al. 2020
Unr. †Choristodera Cope 1876 [choristodere]
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Invalid names: Champsosauria Jaekel 1910 [synonym], Simoedosauria Dollo [synonym]
Unr. Lepidosauromorpha Benton 1983
G. †Saurosternon Huxley 1868
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Saurosternon bainii Huxley 1868
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Invalid names: Saurosternon baini Huxley [objective synonym]
G. †Sphodrosaurus Colbert 1960
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Fm. †Weigeltisauridae Kuhn 1939
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Subfm. †Glaurunginae Bulanov and Sennikov 2015
G. †Rautiania Bulanov and Sennikov 2006
G. †Wapitisaurus Brinkman 1988
G. †Weigeltisaurus Kuhn 1939
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Invalid names: Palaeochamaeleo Weigelt 1930 [replaced]
Invalid names: Coelurosauravidae Carroll 1978 [synonym]
Unr. †Younginiformes Romer 1933
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G. †Acerosodontosaurus Currie 1980
Superfm. †Younginoidea Currie 1982
Invalid names: Galesphyridae Currie 1981 [empty]
Invalid names: Acerosodontosauridae [empty], Noteosuchidae Broom 1925 [empty], Palaeagamidae Broom 1926 [empty]
G. †Horaffia Klein and Hagdorn 2014
+
Horaffia kugleri Klein and Hagdorn 2014
Or. †Hupehsuchia Carroll and Dong 1991
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G. †Eohupehsuchus Chen et al. 2014
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Eohupehsuchus brevicollis Chen et al. 2014
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G. †Hupehsuchus Young and Dong 1972
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Hupehsuchus nanchangensis Young and Dong 1972
G. †Nanchangasaurus Wang 1959
Subfm. †Parahupehsuchinae Chen et al. 2015
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G. †Eretmorhipis Chen et al. 2015
G. †Parahupehsuchus Chen et al. 2014
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Parahupehsuchus longus Chen et al. 2014
G. †Nanchangosaurus Wang 1959
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Nanchangosaurus suni Wang 1959
Invalid names: Nanchangosauridae Wang 1959 [empty]
Unr. †Ichthyosauromorpha Motani et al. 2015
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G. †Baisesaurus Ren et al. 2022
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Baisesaurus robustus Ren et al. 2022
Unr. †Ichthyosauriformes Motani et al. 2015
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Unr. †Ichthyopterygia Owen 1840
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Unr. †Eoichthyosauria Motani 1999
Or. †Heteropinnatoidea Appleby 1979
Invalid names: Ekbainacanthus Yakowlew 1902 [nomen dubium], Euichthyopterygia Motani 1999 [empty], Grippidia Wiman 1933 [empty], Grippoidea Ji et al. 2016 [empty], Ichthyoterus Rouiellier 1847 [nomen dubium], Latipinnatoidea Huene 1948 [empty], Macropterygius Huene 1922 [nomen dubium], Mixosauroidea Appleby 1979 [empty], Omphalosaurus merriami Maisch 2010 [nomen dubium], Pachygonosaurus von Huene 1916 [nomen dubium], Perrinosaurus Merriam 1938 [nomen dubium], Rotundopteryx Maisch and Matzke 2000 [nomen dubium], Spitsbergenosaurus Mazin 1981 [nomen dubium]
Unr. †Nasorostra Jiang et al. 2016
+
G. †Cartorhynchus Motani et al. 2015
G. †Sclerocormus Jiang et al. 2016
G. †Lanthanolania Modesto and Reisz 2002
+
Lanthanolania ivakhnenkoi Modesto and Reisz 2002
G. †Palacrodon Broom 1906
+
Palacrodon browni Broom 1906
+
Invalid names: Fremouwsaurus geludens Gow 1992 [synonym]
Invalid names: Fremouwsaurus Gow 1992 [synonym]
Subor. †Sauropterygia Owen 1859
+
G. †Atopodentatus Cheng et al. 2014
+
Atopodentatus unicus Cheng et al. 2014
Or. †Eosauropterygia Rieppel 1994
+
G. †Corosaurus Case 1936
+
Corosaurus alcovensis Case 1936
Fm. †Cymatosauridae von Huene
+
G. †Tanaisosaurus Sennikov 2001
G. †Dawazisaurus Cheng et al. 2016
+
Dawazisaurus brevis Cheng et al. 2016
G. †Diandongosaurus Shang et al. 2011
+
Diandongosaurus acutidentatus Shang et al. 2011
G. †Hispaniasaurus Marquez-Aliaga et al. 2017
+
Hispaniasaurus cranioelongatus Marquez-Aliaga et al. 2017
G. †Majiashanosaurus Jiang et al. 2014
+
Majiashanosaurus discocoracoidis Jiang et al. 2014
Fm. †Nothosauridae Baur 1889
+
G. †Brevicaudosaurus Shang et al. 2020
G. †Ceresiosaurus Peyer 1931
G. †Germanosaurus Nopcsa 1928
G. †Lamprosauroides Schmidt 1927
+
Invalid names: Lamprosaurus Meyer 1860 [replaced]
G. †Metanothosaurus Yabe and Shikana 1948
G. †Micronothosaurus Haas 1963
Subfm. †Nothosaurinae Nopcsa 1923
G. †Nothosaurus Münster 1834
+
Invalid names: Dracosaurus Munster 1834 [synonym], Elmosaurus Huene 1957 [synonym], Kolposaurus Skuphos 1893 [synonym], Opeosaurus Meyer 1847 [synonym], Paranothosaurus Peyer 1939 [synonym], Shingyisaurus Young 1965 [synonym]
Invalid names: Nothosaurus cuvieri Quenstedt 1885 [nomen dubium]
Superfm. †Nothosauroidea Huene 1956
+
G. †Sanchiaosaurus Young 1965
+
G. †Dianmeisaurus Shang and Li 2015
G. †Odoiporosaurus Renesto et al. 2014
G. †Prosantosaurus Klein et al. 2022
Superfm. †Pachypleurosauroidea Huene 1956
+
Fm. †Keichousauridae Young 1965
Fm. †Pachypleurosauridae Nopcsa 1928
Subor. †Pistosauroidea Baur 1887
+
G. †Chinchenia Young 1965
G. †Cymatosaurus Fritsch 1894
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Invalid names: Eurysaurus Gaudry 1878 [synonym], Proneusticosaurus Volz 1902 [synonym]
G. †Kwangsisaurus Young 1959
G. †Wangosaurus Ma et al. 2015
G. †Yunguisaurus Cheng et al. 2006
Invalid names: Cymatosauria Huene 1944 [empty]
G. †Qianxisaurus Cheng et al. 2012
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Qianxisaurus chajiangensis Cheng et al. 2012
G. †Wumengosaurus Jiang et al. 2008
+
Invalid names: Nothosaurus picardi Chop 1857 [nomen dubium]
G. †Ischyrosaurus Cope 1869
Subor. †Nanchangosauroidea Wang 1959
+
Invalid names: Nothosauravidae Kuhn 1964 [empty]
Or. †Nothosauria Baur 1889 [nothosaur]
+
Fm. †Lariosauridae Gervais 1859
+
G. †Phygosaurus Arthaber 1924
Invalid names: Macromirosauridae Baur 1886 [synonym]
G. †Partanosaurus Skuphos 1893
+
Partanosaurus zitteli Skuphos 1893
G. †Pontopus
Fm. †Simosauridae Nopcsa 1928
+
G. †Conchiosaurus Meyer 1833
G. †Paludidraco de Miguel Chaves et al. 2018
G. †Simosaurus Meyer 1842
Invalid names: Anarosauridae Jaekel 1910 [empty], Corosauridae Kuhn 1961 [empty], Germanosauridae Rieppel 2000 [empty], Neusticosauridae [empty], Proneusticosauridae Huene 1952 [empty]
Unr. †Pistosauria Baur 1890
+
G. †Augustasaurus Sander 1997
+
Augustasaurus hagdorni Sander 1997
G. †Bobosaurus Dalla Vecchia 2006
+
Bobosaurus forojuliensis Dalla Vecchia 2006
G. †Pistosaurus Meyer 1839
+
Pistosaurus longaevus Meyer 1839
+
Invalid names: Nothosaurus strunzi Geissler 1895 [synonym], Pistosaurus grandaevus Meyer 1839 [objective synonym]
Invalid names: Pistosauridae Zittel 1887 [empty]
Or. †Placodontia Cope 1871 [placodont]
+
G. †Chelyposuchus Romer 1966
Fm. †Cyamodontidae Nopcsa 1923
+
G. †Cyamodus von Meyer 1863
Subor. †Cyamodontoidea Nopcsa 1923
+
Unr. †Cyamodontida Nopsca 1923
Unr. †Placochelyida Romer 1956
Fm. †Placochelyidae Jaekel 1910
G. †Priscochelys Karl 2005
G. †Psephosauriscus Rieppel 2002
Invalid names: Psephosaurus picardi Brotzen 1956 [nomen dubium]
Subor. †Henodontida Kuhn 1961
+
Fm. †Henodontidae von Huene 1936
G. †Negevodus Mazin 1986
Fm. †Paraplacodontidae Peyer and Kuhn-Schnyder 1955
+
G. †Paraplacodus Peyer 1931
G. †Pararcus Klein and Scheyer 2014
+
Pararcus diepenbroeki Klein and Scheyer 2014
Superfm. †Placodontoidea Nopcsa 1923
+
Fm. †Placodontidae Cope 1871
Invalid names: Hemilopadidae Jaekel 1910 [empty], Placodontida Peyer and Kun-Schnyder 1955 [empty], Priscochelys hegnabrunnensis Karl 2005 [nomen dubium]
Unr. †Placodontiformes Neenan et al. 2013
+
G. †Palatodonta Neenan et al. 2013
+
Palatodonta bleekeri Neenan et al. 2013
Or. †Plesiosauria de Blainville 1835 [plesiosaur]
+
G. †Aptychodon Reuss 1855
G. †Bathyspondylus Delair 1982
+
G. †Crymocetus Romer 1966
G. †Embaphias Cope 1894
G. †Eoplesiosaurus Benson et al. 2012
+
Eoplesiosaurus antiquior Benson et al. 2012
G. †Eretmosaurus Seeley 1874
+
Eretmosaurus dubius Tate and Blake 1876
Eretmosaurus rugosus Owen 1840
G. †Hexatarsostinus Hawkins 1840
G. †Lindwurmia Vincent and Storrs 2019
+
Lindwurmia thiuda Vincent and Storrs 2019
G. †Megalneusaurus Knight 1898
+
Megalneusaurus rex Knight 1895
G. †Namuncurania Rusconi 1943
G. †Nothosaurops Leidy 1870
G. †Oligosimus Leidy 1872
G. †Orophosaurus Cope 1851
G. †Piptomerus Cope 1887
G. †Piratosaurus Leidy 1865
Superfm. †Plesiosauroidea Welles 1943
+
Unr. †Cryptoclidia Ketchum and Benson 2010
+
Invalid names: Cryptocleidoidea Williston 1925 [replaced]
Fm. †Cryptoclididae Williston 1925
Fm. †Elasmosauridae Cope 1869 [elasmosaur]
+
Invalid names: Cimoliasauridae Delair 1959 [synonym]
G. †Franconiasaurus Sachs et al. 2024
Unr. †Leptocleidia Ketchum and Benson 2010
+
Invalid names: Leptocleidoidea Druckenmiller and Russell 2008 [replaced]
Fm. †Microcleididae Benson et al. 2012
G. †Opallionectes Kear 2006
G. †Plesiopharos Puértolas-Pascual et al. 2021
G. †Plesiopterys O'Keefe 2004
Fm. †Plesiosauridae Gray 1825
+
Invalid names: Brancasauridae White 1940 [synonym], Muraenosauridae White 1940 [synonym], Tremamesacleididae White 1940 [synonym]
G. †Plesiosaurus de la Beche and Conybeare 1821
Fm. †Polycotylidae Williston 1908
+
Invalid names: Dolichorhynchopidae Welles 1962 [synonym]
G. †Sthenarosaurus Watson 1909
G. †Westphaliasaurus Schwermann and Sander 2011
Invalid names: Cimoliosaurus limnophilus Koken 1887 [nomen dubium], Dolichodeira Seeley 1892 [synonym], Euplesiosauria O'Keefe 2001 [empty]
Superfm. †Pliosauroidea Welles 1943
+
Fm. †Pliosauridae Seeley 1874
Invalid names: Brachydeira Seeley 1892 [synonym], Trinacromeridae Nopcsa 1923 [empty]
G. †Rhaeticosaurus Wintrich et al. 2017
+
Rhaeticosaurus mertensi Wintrich et al. 2017
Fm. †Rhomaleosauridae Nopcsa 1928
+
G. †Anningasaura Vincent and Benson 2012
G. †Archaeonectrus Novozhilov 1964
G. †Atychodracon Smith 2015
G. †Avalonnectes Benson et al. 2012
G. †Bishanopliosaurus Dong 1980
G. †Borealonectes Sato and Wu 2008
G. †Eurycleidus Andrews 1922
G. †Macroplata Swinton 1930
G. †Maresaurus Gasparini 1997
G. †Meyerasaurus Smith and Vincent 2010
G. †Rhomaleosaurus Seeley 1874
G. †Thaumatodracon Smith and Araújo 2017
G. †Yuzhoupliosaurus Zhang 1985
Invalid names: Thaumatosauridae Romer 1956 [synonym]
G. †Stratesaurus Benson et al. 2012
+
Stratesaurus taylori Benson et al. 2012
G. †Sulmosaurus Huene 1952
G. †Taphrosaurus Cope 1870
G. †Uronautes Cope 1876
G. †Zahrisaurus Malkani 2019
+
Zahrisaurus kilmoolai Malkani 2019
Invalid names: Aptychodon cretaceus Reuss 1855 [nomen vanum], Cimoliasaurus lissaensis Fritsch 1905 [nomen vanum], Cimoliasaurus teplicensis Fritsch 1907 [nomen vanum], Cimoliosaurus nazarowi Bogolubov 1911 [nomen vanum], Cimoliosaurus smithi Owen 1884 [nomen vanum], Discosaurus planior Leidy 1870 [nomen vanum], Discosaurus vetustus Leidy 1851 [nomen vanum], Elasmosaurus intermedius Cope 1894 [nomen vanum], Elasmosaurus orientalis Cope 1869 [nomen vanum], Embaphias circulosus Cope 1894 [nomen vanum], Hunosaurus fasseli Fritsch 1905 [nomen vanum], Iserosaurus littoralis Fritsch 1905 [nomen vanum], Lutkesaurus Kiprijanoff 1883 [nomen nudum], Mauisaurus brachiolatus Hector 1874 [nomen vanum], Neoplesiosauria Ketchum and Benson 2010 [empty], Oligosimus grandaevus Leidy 1872 [nomen vanum], Orophosaurus pauciporus Cope 1887 [nomen vanum], Peloneustes kanzleri Koken 1905 [nomen vanum], Piptomerus hexagonus Cope 1887 [nomen vanum], Piptomerus megaloporus Cope 1887 [nomen vanum], Piptomerus microporus Cope 1887 [nomen vanum], Piratosaurus plicatus Leidy 1865 [nomen dubium], Plesiosauriformes Hay 1930 [empty], Plesiosaurus affinis Owen 1840 [nomen dubium], Plesiosaurus australis Owen 1861 [nomen vanum], Plesiosaurus balticus Schröder 1885 [nomen vanum], Plesiosaurus bernardi Owen 1850 [nomen vanum], Plesiosaurus brachistospondylus Hulke 1870 [nomen dubium], Plesiosaurus brevifemur Cope 1875 [nomen vanum], Plesiosaurus brevis Owen 1854 [nomen dubium], Plesiosaurus continuus Owen 1841 [nomen vanum], Plesiosaurus cycnodeirus Seeley 1869 [nomen nudum], Plesiosaurus degenhardti Koken 1887 [nomen vanum], Plesiosaurus ellipsospondylus Phillips 1871 [nomen dubium], Plesiosaurus euryspondylus Seeley 1869 [nomen nudum], Plesiosaurus gouldii Williston 1897 [nomen vanum], Plesiosaurus hexagonalis Phillips 1871 [nomen dubium], Plesiosaurus infraplanus Phillips 1871 [nomen dubium], Plesiosaurus latispinus Owen 1854 [nomen vanum], Plesiosaurus levis Owen 1854 [nomen dubium], Plesiosaurus lockwoodii Cope 1869 [nomen vanum], Plesiosaurus megapleuron Owen 1854 [nomen dubium], Plesiosaurus microdeirus Seeley 1869 [nomen nudum], Plesiosaurus mudgei Cragin 1894 [nomen vanum], Plesiosaurus neocomiensis Campiche 1860 [nomen vanum], Plesiosaurus nordmanni Eichwald 1869 [nomen vanum], Plesiosaurus ophiodeirus Seeley 1869 [nomen nudum], Plesiosaurus pachyomus Owen 1840 [nomen vanum], Plesiosaurus phillipsi Sauvage 1871 [nomen dubium], Plesiosaurus planispondylus Damon 1860 [nomen nudum], Plesiosaurus planus Owen 1864 [nomen vanum], Plesiosaurus planus trigonalis Owen 1864 [nomen vanum], Plesiosaurus platydeirus Seeley 1869 [nomen nudum], Plesiosaurus poecilospondylus Seeley 1869 [nomen nudum], Plesiosaurus shirleyensis Knight 1900 [nomen dubium], Plesiosaurus subdepressus Owen 1854 [nomen nudum], Plesiosaurus traversii Hector 1874 [nomen vanum], Plesiosaurus truncatus Owen 1854 [nomen dubium], Plesiosaurus validus Phillips 1871 [nomen dubium], Plesiosaurus winspitensis Seeley 1871 [nomen dubium], Pliosaurus planus Hulke 1883 [nomen nudum], Plistosauroidea Edinger 1935 [empty], Polycotylus donicus Pravoslavlev 1915 [nomen vanum], Polycotylus epigurgitis Bogolubov 1911 [nomen vanum], Polycotylus orientalis Bogolubov 1911 [nomen vanum], Polycotylus tenuis Hector 1874 [nomen vanum], Polycotylus ultimus Bogolubov 1911 [nomen vanum], Polyptychodon Owen 1841 [nomen vanum], Polyptychodon neocomiensis Schardt 1910 [nomen vanum], Stereosaurus cratynotus Seeley 1869 [nomen nudum], Stereosaurus platyomus Seeley 1869 [nomen vanum], Stereosaurus stenomus Seeley 1869 [nomen nudum], Teleosaurus neogaeus Burmeister and Giebel 1861 [nomen dubium], Uronautes cetiformis Cope 1876 [nomen vanum], Xenopsaria Benson and Druckenmiller 2014 [empty]
Invalid names: Cercidopleura Seeley 1892 [empty], Dicranopleura Seeley 1892 [empty], Eusauropterygia Tschanz 1989 [empty], Microleptosaurus Skuphos 1893 [nomen dubium], Nothosauriformes Storrs 1991 [empty], Simosauria Gervais 1845 [empty]
Fm. †Saurosphargidae Li et al. 2011
+
G. †Hemilopas Meyer 1834
+
Hemilopas mentzeli Meyer 1847
G. †Largocephalosaurus Cheng et al. 2012
+
Largocephalosaurus polycarpon Cheng et al. 2012
Largocephalosaurus qianensis Li et al. 2013
G. †Prosaurosphargis Wolniewicz et al. 2023
+
Prosaurosphargis yingzishanensis Wolniewicz et al. 2023
G. †Sinosaurosphargis Li et al. 2011
+
Invalid names: Saurosphargis Frech 1903 [nomen dubium]
G. †Stauromatodon Sobral et al. 2021
+
Stauromatodon mohli Sobral et al. 2021
Unr. †Thalattosauriformes Nicholls 1999
+
Or. †Thalattosauria Merriam 1905
+
Superfm. †Askeptosauroidea Wu et al. 2009
+
G. †Endennasaurus Renesto 1984
Superfm. †Thalattosauroidea Nopcsa 1928
+
G. †Agkistrognathus Nicholls and Brinkman 1993
G. †Clarazia Peyer 1936
G. †Gunakadeit Druckenmiller et al. 2020
G. †Hescheleria Peyer 1936
G. †Nectosaurus Merriam 1905
G. †Paralonectes Nicholls and Brinkman 1993
Fm. †Thalattosauridae Merriam 1904
G. †Thalattosaurus Merriam 1904
G. †Xinpusaurus Yin 2000
Invalid names: Diaptosauria Osborn 1903 [empty], Endennasauridae [empty], Fremouwsauridae Gow 1992 [empty], Prodiapsida [empty], Rysosteus Owen 1842 [nomen dubium], Utahdactylus Czerkas and Mickelson 2002 [nomen dubium], Utahdactylus kateae Czerkas and Mickelson 2002 [nomen dubium]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: phosphaticsubp
Maximum body mass: 100000 kgg
Minimum body mass: 300 gg
Environment: terrestrialuc
Locomotion: actively mobilec
Created: 2017-04-17 15:15:35
Modified: 2017-04-17 15:15:35
Source: g = genus, c = class, subp = subphylum, uc = unranked clade
References: Witton 2008, Carroll 1988, Peczkis 1995, Hendy et al. 2009

Age range

Maximum range based only on fossils: base of the Missourian to the top of the Holocene or 306.00000 to 0.00000 Ma
Minimum age of oldest fossil (stem group age): 303.7 Ma

Collections (18908 total)

Oldest occurrences

Time interval Ma Country or state Original ID and collection number
Kasimovian - Kungurian307.0 - 272.3USA (Utah) Halgaitosaurus gregarius (218159)
Missourian306.0 - 303.7USA (Kansas) Petrolacosaurus kansensis, Podargosaurus hibbardi (80784)
Virgilian303.7 - 298.9USA (Kansas) Spinoaequalis schultzei (68427)
Asselian298.9 - 295.5France (Languedoc-Roussillon) Aphelosaurus lutevensis (171350)
Wolfcampian298.9 - 286.0USA (New Mexico) Zarcasaurus tanyderus (171346)
Sakmarian293.52 - 290.1Germany (Saxony) Kadaliosaurus priscus (52522)
Artinskian290.1 - 279.3USA (Oklahoma) Orovenator mayorum, Diapsida indet. (67862)
Artinskian290.1 - 279.3USA (Texas) Bolosaurus striatus (13044)
Artinskian - Kungurian290.1 - 272.3USA (Texas) Araeoscelis casei (28250)
Artinskian - Capitanian290.1 - 259.51Poland (Lower Silesia) Saurichnites divaricatus, Saurichnites gracilis (223853) Saurichnites leisnerianus (187930)
Leonardian286.0 - 273.01USA (Oklahoma) Dictybolos tener (79408 84941)
Kungurian279.3 - 272.3USA (Texas) Araeoscelis gracilis (28267)
Late/Upper Kazanian - Urzhumian272.5 - 264.28Russian Federation (Arkhangelsk) Lanthanolania ivakhnenkoi (187648)
Roadian - Capitanian272.3 - 259.51Brazil (Rio Grande do Sul) Archosauromorpha indet. (106558)
Wordian266.9 - 264.28Russian Federation Diapsida indet. (197595)
Late/Upper Severodvinian264.28 - 259.51Russian Federation (Tatarstan) Eorasaurus olsoni (80712)
Severodvinian - Vyatkian264.28 - 257.4Russian Federation (Orenburg) Diapsida sp., Rautiania minichi, Rautiania alexandri (85483)
Wuchiapingian259.9 - 254.17Germany (Saxony Anhalt) Palaeochamaeleo jaekeli, Gracilisaurus ottoi, Glaurung schneideri, Coelurosauravus sp., Protorosaurus speneri (85484) Protorosaurus speneri (93035)
Wuchiapingian259.9 - 254.17South Africa (Northern Cape) Galesphyrus capensis (115685)
Wuchiapingian259.9 - 254.17South Africa (Western Cape) Youngina capensis (84714)