Quadrula couchiana (Lea, 1860)
2 synonyms | 5 specimens
Range: Rio Grande, western Gulf Coastal Plain, south into northern Mexico. [North America]
IUCN Red List: Critically Endangered.
Nature Serve: GH.
Other web sites: ITIS MolluscaBase.

Quadrula fragosa (Conrad, 1836)
4 synonyms | 1 specimen
Range: Upper Mississippi and Ohio rivers, USA. [North America]
Genbank sequences: 5.8S, COI, ITS1, ND1, SRA.
IUCN Red List: Critically Endangered.
Nature Serve: G1 Endangered; Experimental population, non-essential.
Other web sites: ITIS MolluscaBase.

Quadrula nobilis (Conrad, 1854)
2 synonyms | 1 specimen
Range: Mobile Basin west to Texas, Gulf Coastal Plain, and in the Interior Basin north to Kentucky, USA. [North America]
Genbank sequences: 16S, COI, ND1, SRA.
Nature Serve: G4 (Tritogonia nobilis).
Other web sites: ITIS MolluscaBase.

Quadrula quadrula (Rafinesque, 1820)
25 synonyms | 11 specimens
Range: Widespread in the Interior, Nelson and Great Lakes basins, as well as the western Gulf Coastal Plain, North America. [North America]
Genbank sequences: 16S, 28S, 5.8S, COI, COI M-type, COII, COII M-type, ITS1, ND1, SRA, mtGenome, mtGenome M-type.
IUCN Red List: Least Concern (Quadrula rumphiana), Least Concern.
Nature Serve: G5.
Other web sites: ITIS 2 3 MolluscaBase 2.

Quadrula verrucosa (Rafinesque, 1820)
11 synonyms | 4 specimens
Range: Widespread in the Interior and Gulf Coastal Plain, eastern North America. [North America]
Genbank sequences: 16S, 28S, 5.8S, COI, ITS1, ND1, SRA.
Nature Serve: G4G5 (Tritogonia verrucosa).
Other web sites: ITIS MolluscaBase.

Quadrula cylindricoides (Whitfield, 1907) (Cretaceous)
1 synonym | 0 specimens
Range:
Other web site: MolluscaBase.

Quadrula natosini (McLearn, 1929) (Cretaceous)
1 synonym | 0 specimens
Range:
Other web site: MolluscaBase.

Quadrula primaevus (White, 1877) (Cretaceous)
1 synonym | 0 specimens
Range: Cretaceous, North America.
Other web site: MolluscaBase.

Quadrula subprimaevus (Dyer, 1930) (Cretaceous)
1 synonym | 0 specimens
Range: Cretaceous, North America.