Ptychobranchus fasciolaris (Rafinesque, 1820)
17 synonyms | 6 specimens
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.
IUCN Red List: Near Threatened.
Nature Serve: G4G5.
Other web sites: ITIS MolluscaBase.

Ptychobranchus foremanianus (Lea, 1842)
7 synonyms | 3 specimens
Range: Alabama River, eastern Gulf Coastal Plain, USA. [North America]
Nature Serve: G1.
Other web sites: ITIS MolluscaBase.

Ptychobranchus greenii (Conrad, 1834)
5 synonyms | 4 specimens
Range: Tombigbee River, eastern Gulf Coastal Plain, USA. [North America]
Genbank sequences: 16S, ND1.
IUCN Red List: Endangered.
Nature Serve: G1G2 Endangered.
Other web sites: ITIS MolluscaBase.

Ptychobranchus jonesi (van der Schalie, 1934)
1 synonym | 0 specimens
Range: Choctawhatchee and Escambia rivers, Florida and Alabama, eastern Gulf Coastal Plain, USA. [North America]
Genbank sequences: 16S, ND1.
IUCN Red List: Critically Endangered.
Nature Serve: G1 Endangered.
Other web sites: ITIS MolluscaBase.

Ptychobranchus occidentalis (Conrad, 1836)
2 synonyms | 2 specimens
Range: Ozark Plateau, USA. [North America]
Genbank sequences: 16S, ND1.
IUCN Red List: Lower Risk/near threatened.
Nature Serve: G3G4.
Other web sites: ITIS MolluscaBase.

Ptychobranchus subtentus (Say, 1825)
6 synonyms | 0 specimens
Range: Cumberland and Tennessee rivers, USA. [North America]
Genbank sequences: 16S, ND1.
IUCN Red List: Lower Risk/near threatened (Ptychobranchus subtentum).
Nature Serve: G2? Endangered.
Other web sites: ITIS MolluscaBase.

Ptychobranchus langeckeri Modell, 1950 (fossil)
1 synonym | 0 specimens
Range:
Other web site: MolluscaBase.

Ptychobranchus subspatulatus (Meek & Hayden, 1857) (Cretaceous)
2 synonyms | 0 specimens
Range: Cretaceous, North America.