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MUSSELpdb

Taxonomy

Species & Genus Richness by
Taxonomy

Geography

Species Richness & Endemism by
Geography

Data last updated
Mon 1 Dec 2025

genus Ptychobranchus Simpson, 1900: species

3 available nominal genus synonyms | cladomics

Included Species

Ptychobranchus fasciolaris (Rafinesque, 1820)

syonymy (15 available, 17 total) | specimens (6 + 5 Genbank vouchers)

Range: Widespread in the Ohio, Great Lakes and Ozark basins, North America. (North America)

Genbank sequences: 16S, 28S, 5.8S, COI, COI M-type, COII, COII M-type, ITS1, ND1, other
IUCN Red List: Near Threatened A2ce
NatureServe: G4
other links: MolluscaBase

Decorative image of a representative of Ptychobranchus foremanianus

Ptychobranchus foremanianus (Lea, 1842)

syonymy (4 available, 7 total) | specimens (3)

Range: Alabama River, eastern Gulf Coastal Plain, USA. (North America)

NatureServe: G1
other links: MolluscaBase

Decorative image of a representative of Ptychobranchus greenii

Ptychobranchus greenii (Conrad, 1834)

syonymy (4 available, 5 total) | specimens (4)

Range: Tombigbee River, eastern Gulf Coastal Plain, USA. (North America)

Genbank sequences: 16S, ND1
IUCN Red List: Endangered B1ab(iii)
NatureServe: G1
other links: MolluscaBase

Ptychobranchus jonesi (van der Schalie, 1934)

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

Range: Choctawhatchee and Escambia rivers, Florida and Alabama, eastern Gulf Coastal Plain, USA. (North America)

Genbank sequences: 16S, ND1
IUCN Red List: Critically Endangered A2ace
NatureServe: G1
other links: MolluscaBase

Decorative image of a representative of Ptychobranchus occidentalis

Ptychobranchus occidentalis (Conrad, 1836)

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

Range: Ozark Plateau, USA. (North America)

Genbank sequences: 16S, ND1
IUCN Red List: Lower Risk/near threatened
NatureServe: G3
other links: MolluscaBase

Ptychobranchus subtentus (Say, 1825)

syonymy (2 available, 6 total) | specimens (0)

Range: Cumberland and Tennessee rivers, USA. (North America)

Genbank sequences: 16S, ND1
IUCN Red List: Lower Risk/near threatened (Ptychobranchus subtentum)
NatureServe: G2
other links: MolluscaBase

Ptychobranchus langeckeri Modell, 1950 (fossil)

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

Ptychobranchus subspatulatus (Meek & Hayden, 1857) (Cretaceous)

syonymy (1 available, 2 total) | specimens (0)

Range: Cretaceous, North America.

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