Classification of the family Onychocellidae
Fm. Onychocellidae Jullien 1882
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G. †Aechmella Canu and Bassler 1917
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†Aechmella ambigua MacGillivray 1895
†Aechmella depressa MacGillivray 1895
†Aechmella poluzzii Moissette 1988
†Aechmella rangiauriensis Taylor and Gordon 2007
G. †Cheethamia
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†Cheethamia aktolagayensis Koromyslova et al. 2018
†Cheethamia volgaensis Koromyslova and Seltser 2020
G. †Collura
G. †Distefanella Cipolla 1922
G. †Ehrhardina Martha and Taylor 2016
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†Ehrhardina pikeae Martha and Taylor 2016
†Ehrhardina voigti Martha and Taylor 2016
G. Floridina Jullien 1881
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†Floridina asymmetrica Canu and Bassler 1920
†Floridina elegans Gordon and Taylor 2015
†Floridina pentagonus Guha and Gopikrishna 2005
G. †Hoplitaechmella
G. †Ogiva Jullien 1881
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†Ogiva concamerata Waters 1881
†Ogiva ellinorvoigtae Martha et al. 2015
†Ogiva elongata Canu and Bassler 1935
†Ogiva incompta Gordon and Taylor 1999
†Ogiva promonturiorum Voigt 1924
G. Ogivalia
G. Onychocella Jullien 1882
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Onychocella angulosa Reuss 1848
†Onychocella cyclostoma Goldfuss 1826
†Onychocella depressa von Hagenow 1851
†Onychocella lamellosa Gordon and Taylor 1999
†Onychocella michaudiana d'Orbigny 1850
†Onychocella pseudoirregularis Voigt 1924
†Onychocella reussi Prantl 1938
†Onychocella spinifera Voigt 1981
†Onychocella subtriangulata Gordon and Taylor 2015
†Onychocella torquata Guha and Gopikrishna 2005
Invalid names: Reptocelleporaria D'Orbigny [synonym]
G. †Reptolunulites d'Orbigny 1852
G. †Rhagasostoma
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†Rhagasostoma angliae Brydone 1936
†Rhagasostoma aralense Koromyslova et al. 2018
†Rhagasostoma brydonei Koromyslova et al. 2018
†Rhagasostoma gibbosulum Brydone 1936
†Rhagasostoma gibbosum Marsson 1887
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Invalid names: Rhagasostoma gibbosum weybournensis Brydone 1930 [synonym], Rhagasostoma subgibbosum Brydone 1930 [synonym]
†Rhagasostoma inelegans Lonsdale 1850
†Rhagasostoma mimosa Brydone 1930
†Rhagasostoma minuens Brydone 1936
†Rhagasostoma operculatum Koromyslova et al. 2018
†Rhagasostoma saltans Brydone 1930
†Rhagasostoma tchvanovi Favorskaya 1992
G. †Rhebasia
G. †Semieschara
G. Smittipora Jullien 1882
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Smittipora cordiformis Harmer 1926
Invalid names: Diplopholeous [synonym], Rectonychocella [synonym], Velumella [synonym]
G. †Thyracella