Classification of Yin and Yochelson 1983

G. †Discohelix Dunker 1847
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Subg. †Discohelix (Discogonius) Yin and Yochelson 1983
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Discohelix (Discogonius) subvenusta Yin and Yochelson 1983
G. †Triassocirrus Yin and Yochelson 1983
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Triassocirrus applanatus Kutassy 1937
Triassocirrus guizhouensis Yin and Yochelson 1983
Triassocirrus pichleri Laube 1869
G. †Coelostylina Kittl 1894
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Coelostylina ahlburgi Assmann 1924
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Kittliconcha obesa Yu et al. 1974
G. †Omphaloptycha Ammon 1878
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Omphaloptycha scalaris Yin and Yochelson 1983
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Polygyrina lommeli Muenster 1841
G. †Spirostylus Kittl 1894
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Spirostylus subcolumnaris Münster 1841
G. †Toxoconcha Kittl 1899
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Toxoconcha brocchi Stoppani 1857
G. †Trypanostylus Cossmann 1895
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Trypanostylus haueri Giebel 1856
G. †Tyrsoecus
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Tyrsoecus multinodosa Yin and Yochelson 1983
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Zygopleura arctecostata Münster 1841
Zygopleura walmstedti Klipstein 1843
Fm. Neritidae Rafinesque 1815
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G. †Natitaria Koken 1892
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Natitaria candida Kittl 1894
Subg. †Straparollus (Euomphalus) Sowerby 1814
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Straparollus (Euomphalus) qingyanensis Yin and Yochelson 1983