Classification of the infraclass Chondrostei
Infracl. Chondrostei Müller 1844
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Or. Acipenseriformes Berg 1940
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Fm. Acipenseridae Bonaparte 1831
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G. Acipenser Linnaeus 1758 [sturgeon]
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†Acipenser albertensis Lambe 1902
†Acipenser amnisinferos Hilton and Grande 2022
Acipenser brevirostrum Leseuer 1818 [shortnose sturgeon]
Acipenser fulvescens Rafinesque 1817 [lake sturgeon]
†Acipenser gigantissimus Nessov 1997
Acipenser medirostris Ayres 1854
†Acipenser molassicus Probst 1882
†Acipenser ornatus Leidy 1873
†Acipenser oxyrhynchus Mitchell 1814
†Acipenser praeparatorum Hilton and Grande 2022
†Acipenser toliapicus Agassiz 1844
†Acipenser tuberculosus Probst 1882
Invalid names: Acipenses Linck 1790 [synonym]
Subfm. †Priscosturioninae Grande and Hilton 2009
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Subfm. Scaphirhynchinae Bonaparte 1846
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Invalid names: Propenserinae Applegate 1970 [empty], Pseudoscaphirhynchinae [empty]
Subor. Acipenseriodei Nelson 2016
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G. †Cylindracanthus Leidy 1856
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†Cylindracanthus acus Cope 1870
†Cylindracanthus bisulcatus Arambourg and Joleaud 1943
†Cylindracanthus gigas Woodward 1888
†Cylindracanthus isnusris Udovichenko and Nessov 1987
†Cylindracanthus ornatus Leidy 1856
†Cylindracanthus rectus Agassiz 1843
Unr. Acipenseristomi Grande and Bemis 1996
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Invalid names: Peipiaosteoidei Grande and Bemis 1996 [empty]
Subor. †Chondrosteoidei Grande and Bemis 1991
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Fm. †Chondrosteidae Egerton 1858
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G. †Chondrosteus Agassiz 1843
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†Chondrosteus acipenseroides Egerton 1858
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Invalid names: Chondrosteus crassior Egerton 1858 [synonym]
†Chondrosteus pachyurus Egerton 1858
G. †Gyrosteus Agassiz 1843
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G. †Strongylosteus Jaeckel 1931
Fm. †Errolichthyidae Lehman 1952
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Invalid names: Saurichthidae Mishra et al. 1990 [empty]
Or. †Luganoiiformes Lehman 1958
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Fm. †Luganoiidae Brough 1939
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G. †Besania Brough 1939
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†Besania micrognathus Brough 1939
†Besania schaufelbergeri Herzog and Bürgin 2005
G. †Guizhoubrachysomus Liu 2004
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†Guizhoubrachysomus minor Liu 2003
Invalid names: Brachysomus Liu 2003 [replaced]
G. †Luganoia Brough 1939
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†Luganoia fortuna Xu 2020
†Luganoia lepidosteoides Brough 1939
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Invalid names: Luganoia intermedia Brough 1939 [synonym], Luganoia macrodentata Brough 1939 [synonym]
Or. †Pholidopleuriformes
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Fm. †Pholidopleuridae Nielsen 1949
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G. †Australosomus Pivetau 1930
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†Australosomus altisquamosus Beltan 1980
†Australosomus longirostris Beltan 1968
†Australosomus merlei Piveteau 1930
†Australosomus pholidopleuroides Nielsen 1949
G. †Pholidopleurus Bronn 1858
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†Pholidopleurus kochi Stensiö 1932
†Pholidopleurus ticinensis Bürgin 1992
†Pholidopleurus typus Bronn 1858
Or. †Ptycholepiformes
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G. †Chungkingichthys Su 1974
Fm. †Ptycholepididae Brough 1939
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G. †Acrorhabdus Stensiö 1921
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†Acrorhabdus asplundi Stensiö 1921
†Acrorhabdus bertili Stensiö 1921
†Acrorhabdus latistriatus Stensiö 1921
G. †Boreosomus Stensiö 1921
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†Boreosomus arcticus Woodward 1912
†Boreosomus gillioti Priem 1924
†Boreosomus merlei Beltan 1957
†Boreosomus piveteaui Nielsen 1942
†Boreosomus reuterskioldi Stensiö 1921
†Boreosomus scaber Stensiö 1921
G. †Ptycholepis Agassiz 1832
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†Ptycholepis avus Kner 1866
†Ptycholepis barboi Bassani 1886
†Ptycholepis barrati Sauvage 1875
†Ptycholepis bollensis Agassiz 1832
†Ptycholepis curtus Egerton 1854
†Ptycholepis gracilis Davis 1884
†Ptycholepis magnus Bürgin 1992
†Ptycholepis marshii Newberry 1878
†Ptycholepis minor Egerton 1852
†Ptycholepis monilifer Woodward 1895
†Ptycholepis priscus Bürgin 1992
†Ptycholepis schaefferi Bürgin 1992
†Ptycholepis tenuisquamata Kner 1867
†Ptycholepis viai Beltan 1972
Or. †Saurichthyiformes
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Fm. †Saurichthyidae Stensiö 1925
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G. †Saurichthys Agassiz 1834
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Subg. †Saurichthys (Costasaurichthys) Tintori 2013
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†Saurichthys (Costasaurichthys) costasquamosus Rieppel 1985
†Saurichthys (Costasaurichthys) paucitrichus Rieppel 1992
Subg. †Saurichthys (Eosaurichthys) Liu and Wei 1988
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†Saurichthys (Eosaurichthys) chaoi Liu and Wei 1988
†Saurichthys (Eosaurichthys) madagascariensis Piveteau 1945
Subg. †Saurichthys (Lepidosaurichthys) Tintori 2013
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†Saurichthys (Lepidosaurichthys) dayi Raymond 1925
†Saurichthys (Lepidosaurichthys) elongatus Stensiö 1925
†Saurichthys (Lepidosaurichthys) ornatus Stensiö 1925
†Saurichthys (Lepidosaurichthys) toxolepis Mutter et al. 2008
Subg. †Saurichthys (Sinosaurichthys) Wu et al. 2011
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†Saurichthys (Sinosaurichthys) longipectoralis Wu et al. 2011
†Sinosaurichthys longimedialis Wu et al. 2011
†Sinosaurichthys minuta Wu et al. 2011
†Saurichthys aculeatus Henry 1876
†Saurichthys apicalis Agassiz 1834
†Saurichthys breviabdominalis Maxwell 2015
†Saurichthys calcaratus Griffith 1977
†Saurichthys curionii Bellotti 1857
†Saurichthys daubreei Firtion 1934
†Saurichthys dawaziensis Wu et al. 2009
†Saurichthys deperditus Costa 1862
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Invalid names: Saurichthys krambergeri Schlosser 1918 [synonym]
†Saurichthys dongusensis Minikh 1992
†Saurichthys eximius Minikh 1982
†Saurichthys gigas Woodward 1890
†Saurichthys gracilis Woodward 1890
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Invalid names: Belonorhynchus gracilis Woodward 1890 [synonym]
†Saurichthys grignae Tintori 2013
†Saurichthys gypsophilus Reis 1892
†Saurichthys hamiltoni Stensiö 1925
†Saurichthys huanshenensis Chou and Liu 1957
†Saurichthys indicus Koninck 1863
†Saurichthys irregularis Oertle 1928
†Saurichthys latifrons Frech 1903
†Saurichthys lepidosteoides Frech 1903
†Saurichthys longidens Agassiz 1843
†Saurichthys macrocephalus Deecke 1889
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Invalid names: Belonorhynchus robustus Bassani 1886 [synonym]
†Saurichthys majiashanensis Tintori et al. 2014
†Saurichthys nepalensis Beltan and Janvier 1978
†Saurichthys obrutchevi Minikh 1982
†Saurichthys orientalis Sytchevskaya 1999
†Saurichthys parvidens Woodward 1890
†Saurichthys piveteaui Beltan 1968
†Saurichthys proximus Minikh 1982
†Saurichthys sceltrichensis Renesto et al. 2021
†Saurichthys seefeldensis Beltan and Tintori 1980
†Saurichthys semicostatus Münster 1839
†Saurichthys spinosa Wu et al. 2018
†Saurichthys stensioi Lehman 1952
†Saurichthys striatulus Henry 1876
†Saurichthys subulatus Henry 1876
†Saurichthys tenuirostris Münster 1839
†Saurichthys tertius Minikh 1982
†Saurichthys ultimus Minikh 1992
†Saurichthys vjuschkovi Minikh 1983
†Saurichthys wimani Woodward 1912
†Saurichthys yangjuanensis Wu et al. 2015
†Saurichthys yunnanensis Zhang et al. 2010
Invalid names: Ichthyorhynchus Bellotti 1857 [synonym]
G. †Saurorhynchus Reis 1892
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†Saurorhynchus acutus Agassiz 1843
†Saurorhynchus anningae Maxwell and Stumpf 2017
†Saurorhynchus brevirostris Woodward 1895
†Saurorhynchus hauffi Maxwell and Stumpf 2017
Invalid names: Acidorhynchus Stensio 1925 [synonym]
Invalid names: Belonorhynchidae Woodward 1888 [synonym]
Fm. †Yelangichthyidae Wu et al. 2013
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Invalid names: Asterodontidae [empty], Cheirolepiformes [empty], Chondrosteiformes [empty], Diphyodontidae [empty], Guidayichthyiformes Lund 2000 [empty], Phanerorhynchiformes [empty], Polyodonti Jaekel 1911 [empty], Sturii Jaekel 1911 [empty]