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Unionidae
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Species & Genus Richness offreshwater musselsby Taxonomy
Species & Genus Richness offreshwater bivalves by Family
North America
Central America
South America
Afrotropics
North Eurasia
East Asia
Australasia
Species Richness & Endemism offreshwater mussels by Geography
Data last updated Mon 2 March 2026
Bivalvia | Manzanellida | Manzanelloidea
2 genera
Vokes, 1956. Jour. Paleont. 30(3): 652.Type genus: Nucinella Wood, 1851 = Nucinella