Classification of Horný 1992
Or. Archaeogastropoda Thiele 1925
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Fm. †Tychobraheidae Horný 1992
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G. †Micromphalus Knight 1945
G. †Straparollina Billings 1865
G. †Yunnania Mansuy 1912
Fm. †Platyceratidae Hall 1859
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Fm. †Murchisoniidae Koken 1896
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G. †Vladanella Horný 1992
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†Vladanella avia Horný 1992
†Vladanella enigma Horný 1992
†Vladanella mariannae Horný 1992
Fm. †Tryblidiidae von Zittel 1899
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Fm. †Subulitidae Lindström 1884
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Fm. †Holopeidae Wenz 1938
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Fm. †Microdomatidae Wenz 1938
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Superfm. †Oriostomatacea Wenz 1938
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Fm. †Oriostomatidae Koken 1896
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G. †Oriomphalus Horný 1992
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†Oriomphalus puellarum Horný 1992
†Oriomphalus supraliratus Rohr and Smith 1978
Superfm. †Cyrtonellacea Knight and Yochelson 1958
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