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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
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Australasia
Species Richness & Endemism offreshwater mussels by Geography
Data last updated Fri 13 February 2026
Bivalvia | Trigoniida
1 family
Lamarck, 1819. Hist. Natur. Anim. sans Vert. 6: ??.Type genus: Trigonia Bruguière, 1789 = Trigonia
Kobayashi, 1954. Japan Jour. Geol. Geogr. 25: ??.Type genus: Neotrigonia Cossmann, 1912 = Neotrigonia