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Species & Genus Richness by
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Species Richness & Endemism by
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Data last updated
Mon 1 Dec 2025

Bivalvia | Unionoida | Unionoidea | Unionidae | Ambleminae | Lampsilini

genus Potamilus Rafinesque, 1818: species

11 available nominal genus synonyms (25 total synonyms) | cladomics

Included Species

Potamilus alatus (Say, 1817)

syonymy (3 available, 5 total) | specimens (6 + 6 Genbank vouchers)

Range: Widespread in the Interior, Nelson, and Great Lakes basins, North America. Introduced to the Hudson River on the Atlantic Slope and to China. (North America, East Asia)

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

Decorative image of a representative of Potamilus amphichaenus

Potamilus amphichaenus (Frierson, 1898)

syonymy (1 available, 1 total) | specimens (2 + 30 Genbank vouchers)

Range: Texas, western Gulf Coastal Plain. (North America)

Genbank sequences: 16S, 28S, 5.8S, COI, ITS1, ND1, other, SRA
IUCN Red List: Endangered B1+2c
NatureServe: G2
other links: MolluscaBase

Potamilus capax (Green, 1832)

syonymy (2 available, 3 total) | specimens (2 + 1 Genbank voucher)

Range: Rare on the Ozark Plateau, Upper Mississippi and Ohio basins, USA. (North America)

Genbank sequences: 28S, 5.8S, COI, ITS1, ND1, other, SRA
IUCN Red List: Vulnerable A2ac
NatureServe: G3
other links: MolluscaBase

Potamilus fragilis (Rafinesque, 1820)

syonymy (9 available, 15 total) | specimens (7 + 21 Genbank vouchers)

Range: Widespread in the Interior, Great Lakes and Gulf Coastal Plain basins, North America. Introduced to the Northern Atlantic Slope. (North America)

Genbank sequences: 16S, 28S, 5.8S, COI, ITS1, mtGenome, ND1, other, SRA
IUCN Red List: Extinct (Medionidus mcglameriae), Least Concern (Leptodea fragilis)
NatureServe: G5
other links: MolluscaBase

Decorative image of a representative of Potamilus inflatus

Potamilus inflatus (Lea, 1831)

syonymy (2 available, 3 total) | specimens (1 + 19 Genbank vouchers)

Range: Mobile Basin, eastern Gulf Coastal Plain, USA. (North America)

Genbank sequences: 28S, 5.8S, COI, ITS1, ND1, other, SRA
IUCN Red List: Endangered A1c, B1+2c
NatureServe: G1
other links: MolluscaBase

Decorative image of a representative of Potamilus leptodon

Potamilus leptodon (Rafinesque, 1820)

syonymy (7 available, 10 total) | specimens (4 + 2 Genbank vouchers)

Range: Widespread in the Upper Mississippi and Ohio basins, USA. (North America)

Genbank sequences: 16S, 28S, 5.8S, COI, ITS1, mtGenome, ND1, SRA
IUCN Red List: Lower Risk/near threatened (Leptodea leptodon)
NatureServe: G1
other links: MolluscaBase

Decorative image of a representative of Potamilus metnecktayi

Potamilus metnecktayi R.I. Johnson, 1998

syonymy (1 available, 2 total) | specimens (19 + 4 Genbank vouchers)

Range: Rio Grande Basin, Texas and Mexico. (North America)

Genbank sequences: 28S, 5.8S, COI, ITS1, ND1, other, SRA
NatureServe: G1
other links: MolluscaBase

Decorative image of a representative of Potamilus ohiensis

Potamilus ohiensis (Rafinesque, 1820)

syonymy (6 available, 12 total) | specimens (2 + 20 Genbank vouchers)

Range: Widespread in the Interior Basin and western Gulf Coastal Plain, USA. (North America)

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

Decorative image of a representative of Potamilus purpuratus

Potamilus purpuratus (Lamarck, 1819)

syonymy (7 available, 11 total) | specimens (9 + 60 Genbank vouchers)

Range: Western Gulf Coastal Plain and Ozark Plateau, USA. (North America)

Genbank sequences: 16S, 28S, 5.8S, COI, COI M-type, COII, COII M-type, ITS1, ND1, other, SRA
NatureServe: G5
other links: MolluscaBase

Potamilus streckersoni Smith, Johnson, Inoue, Doyle & Randklev, 2019

syonymy (1 available, 1 total) | specimens (1 + 31 Genbank vouchers)

Range: Endemic to the Brazos River, western Gulf Coastal Plain, Texas. (North America)

Genbank sequences: 28S, 5.8S, COI, ITS1, mtGenome, mtGenome M-type, ND1, other, SRA
NatureServe: GNR
other links: MolluscaBase

Potamilus wasatchensis (Cockerell, 1914) (Tertiary)

syonymy (1 available, 1 total) | specimens (0)

Range: Paleocene, North America.

 
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