MUSSELp

MUSSELpdb

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Unionidae

Margaritiferidae

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Species & Genus Richness by
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Geography

Summary

North America

Central America

South America

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Species Richness & Endemism by
Geography

Data last updated
Mon 1 Dec 2025

Bivalvia | Unionoida | Unionoidea | Unionidae | Ambleminae | Quadrulini

genus Megalonaias Utterback, 1915: species

1 available nominal genus synonym (2 total synonyms) | cladomics

Included Species

Megalonaias nervosa (Rafinesque, 1820)

syonymy (7 available, 14 total) | specimens (24 + 5 Genbank vouchers)

Range: Widespread in the Interior Basin and Gulf Coastal Plain, including the Ochlochonee of Florida, USA south into Mexico. (North America)

Genbank sequences: 16S, 28S, 5.8S, COI, ITS1, ND1, other, SRA
IUCN Red List: Least Concern
NatureServe: G5
other links: MolluscaBase

Decorative image of a representative of Megalonaias nickliniana

Megalonaias nickliniana (Lea, 1834)

syonymy (3 available, 6 total) | specimens (29)

Range: Pánuco, Papaloapán, and the Usumacinta basins, Mexico to Guatemala. (Central America)

other links: MolluscaBase

 
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