Classification of Bandel and Frýda 1999
Fm. †Platyceratidae Hall 1859
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Subcl. Neritimorpha Golikov and Starobogatov 1975
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Or. †Cycloneritimorpha Bandel and Frýda 1999
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Superfm. †Neritopsoidea Gray 1847
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Fm. Neritopsidae Gray 1847
Fm. †Pseudorthonychiidae Bandel and Frýda 1999
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Or. †Cyrtoneritimorpha Bandel and Frýda 1999
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Fm. †Orthonychiidae Bandel and Frýda 1999
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G. †Orthonychia Hall 1843
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†Orthonychia bowsheri Yochelson 1956
†Orthonychia parva Shumard and Swallow 1858
Fm. †Vltaviellidae Bandel and Frýda 1999
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Superfm. †Platyceratoidea Hall 1859