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Unionidae
Margaritiferidae
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Species & Genus Richness by Taxonomy
Summary
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Species Richness & Endemism by Geography
Data last updated Sat 10 January 2026
Clessin, 1877. Deutsche Excurs. Moll. Fauna: 497, fig. 322.(intro'd as intra-sp. of Cyclas rykoltii Normand, 1844)
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= Calyculina rykoltii var. angulata — Clessin, 1877