Classification
Class: Gastropoda
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- Order: Vetigastropoda
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- Superfamily:Pleurotomarioidea
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- Family: Pleurotomariidae
Major Genera
- Genus: Perotrochus (Mikadotrochus)
- Genus: Entemnotrochus
- Genus: Pleurotomaria (fossils only
Classification
Class: Gastropoda
Major Genera