Classification of the suborder Retziidina

Subor. †Retziidina Boucot et al. 1964
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Superfm. †Mongolospiroidea Alekseeva 1981
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Fm. †Mongolospiridae Alekseeva 1981
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G. †Mongolospira Alekseeva 1977
Superfm. †Retzioidea Waagen 1883
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Fm. †Neoretziidae Dagis 1972
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Subfm. †Hungarispirinae Dagys 1972
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†Hungarispira aracanga Bittner 1912
†Hungarispira loretzi Bittner 1890
Subfm. †Hustediinae Grunt 1986
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G. †Hustedia Hall and Clarke 1893
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†Hustedia ambigua Gemmellaro 1899
†Hustedia ampullacea Cooper and Grant 1976
†Hustedia bipartita Girty 1908
†Hustedia borealis Kalashnikov 1981
†Hustedia catella Cooper and Grant 1976
†Hustedia cepacea Cooper and Grant 1976
†Hustedia circularis Miller 1892
†Hustedia citeria Cooper and Grant 1976
†Hustedia compressa Cooper and Grant 1976
†Hustedia connorsi Cooper and Grant 1976
†Hustedia consuta Cooper and Grant 1976
†Hustedia crepax Cooper and Grant 1976
†Hustedia culcitula Cooper and Grant 1976
†Hustedia cuneata Cooper and Grant 1976
†Hustedia decollatensis Cooper and Grant 1976
†Hustedia deminuta Wang 1955
†Hustedia demissa Cooper and Grant 1976
†Hustedia elongata Cooper 1953
†Hustedia episkopiensis Shen and Clapham 2009
†Hustedia funaria Grant 1976
†Hustedia glomerosa Cooper and Grant 1976
†Hustedia grandicosta Davidson 1862
†Hustedia hapala Cooper and Grant 1976
†Hustedia hessensis King 1931
†Hustedia huecoensis King 1931
†Hustedia hyporhachis Hoover 1981
†Hustedia inconspicua Cooper and Grant 1976
†Hustedia indica Waagen 1883
†Hustedia lata Grabau 1931
†Hustedia longirostris Licharew 1978
†Hustedia lusca Cooper and Grant 1976
†Hustedia meridionalis Chronic 1949
†Hustedia mexicana Haack 1915
†Hustedia minuta Tazawa 2011
†Hustedia mormoni Marcou 1858
†Hustedia narinosa Cooper and Grant 1976
†Hustedia opsia Cooper and Grant 1976
†Hustedia orbicostata Xu and Grant 1994
†Hustedia orientalis Mansuy 1920
†Hustedia paula Roberts 1971
†Hustedia pseudocardia Nikitin 1980
†Hustedia pugilla Cooper and Grant 1976
†Hustedia ratburiensis Waterhouse and Piyasin 1970
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Invalid names: Hustedia nakornsrii Yanagida 1970 [synonym], Hustedia thailandica Waterhouse and Piyasin 1970 [synonym]
†Hustedia remota Eichwald 1860
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Invalid names: Retzia buchiana Moeller 1862 [synonym], Retzia nathorsti Lundgren 1887 [synonym]
†Hustedia rupinata Cooper and Grant 1976
†Hustedia samiata Cooper and Grant 1976
†Hustedia sculptilis Cooper and Grant 1976
†Hustedia shumardi Torres-Martínez et al. 2016
†Hustedia sicuaniensis Chronic 1949
†Hustedia spicata Cooper and Grant 1976
†Hustedia stataria Cooper and Grant 1976
†Hustedia sulcata Reed 1944
†Hustedia texana Girty 1926
†Hustedia tomea Cooper and Grant 1976
†Hustedia trisecta Cooper and Grant 1976
†Hustedia trita Cooper and Grant 1976
†Hustedia troelseni Dunbar 1955
†Hustedia xainzaensis Zhan and Wu 1982
Invalid names: Hustedia meekana Shumard 1858 [nomen vanum]
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G. †Schwagerispira Dagys 1972
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†Schwagerispira beneckei Bittner 1890
†Schwagerispira cheni Wang and Chen 2022
†Schwagerispira elegans Guo and Chen 2022
†Schwagerispira fastosa Bittner 1890
†Schwagerispira fuchsi Koken 1900
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Invalid names: Retzia speciosa Bittner 1890 [synonym]
†Schwagerispira pinguis Sun and Ye 1982
†Schwagerispira schwageri Bittner 1890
†Schwagerispira sichuanensis Liao and Sun 1974
†Schwagerispira subcircularis Yang and Xu 1966
G. †Thedusia Cooper and Grant 1976
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†Thedusia angustata Cooper and Grant 1976
†Thedusia biconvexa Cooper and Grant 1976
†Thedusia bucrenata Cooper and Grant 1976
†Thedusia dischides Cooper and Grant 1976
†Thedusia discissa Cooper and Grant 1976
†Thedusia emarginata Cooper and Grant 1976
†Thedusia latisulcata Yang 1986
†Thedusia magna Cooper and Grant 1976
†Thedusia mesocostata Cooper and Grant 1976
†Thedusia paucicostata Cooper and Grant 1976
†Thedusia procera Cooper and Grant 1976
†Thedusia trigonalis Girty 1908
†Thedusia ventricosa Cooper and Grant 1976
Subfm. †Neoretziinae Dagys 1972
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G. †Cassianospira Dagys 1972
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†Cassianospira humboldtii Klipstein 1845
†Cassianospira hungarica Bittner 1912
†Cassianospira klipsteinii Bittner 1890
†Cassianospira laubei Bittner 1890
†Cassianospira loczyi Bittner 1912
†Cassianospira lyrata Münster 1841
G. †Neoretzia Dagys 1963
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†Neoretzia asiatica Bittner 1899
†Neoretzia jingguensis Jin and Fang 1977
†Neoretzia nyalamensis Jin and Sun 1976
†Neoretzia obliquusa Sun 1981
†Neoretzia superba Suess 1856
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Invalid names: Retzia superbescens Bittner 1890 [synonym]
†Neoretzia tibetensis Jin and Sun 1976
Subfm. †Plectospirinae Alvarez et al. 1998
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G. †Cooperispira Alvarez et al. 1998
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†Cooperispira subferita Verneuil 1850
G. †Plectospira Cooper 1942
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†Plectospira ferita von Buch 1835
Invalid names: Ptychospira Hall and Clarke 1894 [replaced]
Fm. †Retziidae Waagen 1883
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G. †Acambona
G. †Eumetria
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†Eumetria iowensis Carter 1972
†Eumetria lata Snider 1915
†Eumetria pitkinensis Snider 1915
G. †Retzia King 1850
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†Retzia arara Laube 1865
†Retzia compressa Meek 1864
†Retzia himaica Bittner 1899
†Retzia magnifica Bittner 1902
†Retzia oxyrhynchus Renz 1912
†Retzia pachygaster Laube 1865
†Retzia procerrima Klipstein 1843
†Retzia radialis Phillips 1836
†Retzia taramellii Salomon 1895
†Retzia truncata Salomon 1895
Invalid names: Retziacea Waagen 1883 [replaced]
Superfm. †Rhynchospirinoidea Schuchert 1929
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Fm. †Parazygidae Alvarez et al. 1998
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G. †Parazyga
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†Parazyga hirsuta Hall 1857
Fm. †Rhynchospirinidae Schuchet 1929
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G. †Homoeospira Hall and Clarke 1893
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†Homoeospira baylei Davidson 1848
†Homoeospira evax Hall 1863
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Invalid names: Homoeospira subcircularis Savage 1913 [synonym]
G. †Homoeospirella Amsden 1968
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†Homoeospirella multicostata Jin and Chatterton 1997
G. †Pseudoparazyga Johnson 1970
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†Pseudoparazyga cooperi Merriam 1940
G. †Rhyncholeptospira Ceccolini and Cianferoni 2023
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Invalid names: Leptospira [replaced]
G. †Rhynchospirina Schuchert and LeVene 1929
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Invalid names: Rhynchospira Hall 1859 [replaced]
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