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Introduction
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d'basing
all genera
Unionidae
Margaritiferidae
Hyriidae
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Species & Genus Richness by Taxonomy
Summary
North America
Central America
South America
Afrotropics
North Eurasia
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Species Richness & Endemism by Geography
Data last updated Sat 10 January 2026
Conrad, 1874. Proc. Acad. Nat. Sci. 26: 29, pl. 1, figs. 10, 13.
= nomen dubium
= Triquetra longula Conrad — Conrad, 1874