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Unionidae
Margaritiferidae
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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 Thu 19 March 2026
Bivalvia | Trigoniida | Trigonioidea | Trigoniidae
0 Recent freshwater species (5 total species)
Cossmann, 1912. Annls. Paleont. 7: 82.
The Taxonomic History lists the ways authors have classified the species currently assigned to Eotrigonia, since 1900.
Eotrigonia — Darragh (1986)