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Taxonomy

all genera

Unionidae

Margaritiferidae

Hyriidae

Etheriidae

Mycetopodidae

Iridinidae


Species & Genus Richness of
freshwater mussels
by Taxonomy


Species & Genus Richness of
freshwater bivalves
by Family

Geography

Summary

North America

Central America

South America

Afrotropics

North Eurasia

East Asia

Australasia


Species Richness & Endemism of
freshwater mussels
by Geography


Data last updated
Thu 22 January 2026

Bivalvia | ... | Unionoidea | Unionidae | Ambleminae | Popenaiadini | Nephronaias aztecorum

nominal species Unio impressus Menke, 1830

Unio impressus Menke, 1830 = Nephronaias aztecorum

Menke, 1830. Syn. Method. Moll.: 107. [nomen nudum]

= Nephronaias aztecorum

Taxonomic Opinions

+ — Cummings et al., 2025

+ Unio (Nephronaias) aztecorum Philippi, 1847 — Martens, 1900

= Unio impressus Menke, 1830 — Menke, 1830

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