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Species & Genus Richness by
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Species Richness & Endemism by
Geography

Data last updated
Mon 1 Dec 2025

Bivalvia | Unionoida | Unionoidea | Unionidae | Ambleminae | Lampsilini

genus Toxolasma Rafinesque, 1831: species

3 available nominal genus synonyms (4 total synonyms) | cladomics

Included Species

Decorative image of a representative of Toxolasma corvunculus

Toxolasma corvunculus (Lea, 1868)

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

Range: Mobile Basin, east to the Choctawhatchee, eastern Gulf Coastal Plain, USA. (North America)

NatureServe: G1
other links: MolluscaBase

Decorative image of a representative of Toxolasma cylindrellus

Toxolasma cylindrellus (Lea, 1868)

syonymy (1 available, 3 total) | specimens (1)

Range: Tennessee River, USA. (North America)

Genbank sequences: 5.8S, ITS1
IUCN Red List: Critically Endangered A2ace; B1ab(i,ii,iii,iv)
NatureServe: G1 (Toxolasma cylindrellum)
other links: MolluscaBase

Toxolasma lividum Rafinesque, 1831

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

Range: Widespread in the Interior Basin, excluding the upper Mississippi, USA. (North America)

Genbank sequences: 28S, 5.8S, COI, COI M-type, COII, COII M-type, ITS1, ND1, other
IUCN Red List: Least Concern
NatureServe: G3
other links: MolluscaBase

Decorative image of a representative of Toxolasma parvum

Toxolasma parvum (Barnes, 1823)

syonymy (3 available, 5 total) | specimens (6 + 2 Genbank vouchers)

Range: Widespread in the Interior Basin and the rivers of the Gulf Coastal Plain, USA and Canada. Introduced to the Apalachicola and Ochlockonee rivers. (North America)

Genbank sequences: 16S, COI, mtGenome, ND1, other
IUCN Red List: Least Concern
NatureServe: G5
other links: MolluscaBase

Decorative image of a representative of Toxolasma paulum

Toxolasma paulum (Lea, 1840)

syonymy (7 available, 9 total) | specimens (8)

Range: Apalachicola River east to peninsular Florida, USA. (North America)

Genbank sequences: COI, ND1, other
NatureServe: G4
other links: MolluscaBase

Decorative image of a representative of Toxolasma pullus

Toxolasma pullus (Conrad, 1838)

syonymy (2 available, 2 total) | specimens (0)

Range: Southern Atlantic Slope from Georgia to North Carolina. (North America)

Genbank sequences: other
IUCN Red List: Vulnerable B1ab(i,iii,iv)
NatureServe: G2
other links: MolluscaBase

Decorative image of a representative of Toxolasma texasiense

Toxolasma texasiense (Lea, 1857)

syonymy (5 available, 9 total) | specimens (15 + 2 Genbank vouchers)

Range: Widespread from in the southern Interior Basin and Western Gulf Coastal Plain, USA, and into Mexico. (North America)

Genbank sequences: 16S, COI, ND1, other
NatureServe: G4
other links: MolluscaBase

 
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