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Data last updated
Mon 1 Dec 2025
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Bivalvia
| Unionoida
| Unionoidea
| Unionidae
| Ambleminae
| Quadrulini
| Quadrulina
genus Quadrula Rafinesque, 1820: species3 available nominal genus synonyms (7 total synonyms) | cladomics
Included Species
 Quadrula nobilis (Conrad, 1854)
syonymy (1 available, 2 total) | specimens (1 + 11 Genbank vouchers)
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
NatureServe: G4 (Tritogonia nobilis)
other links: MolluscaBase
 Quadrula quadrula (Rafinesque, 1820)
syonymy (13 available, 25 total) | specimens (14 + 177 Genbank vouchers)
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, mtGenome, mtGenome M-type, ND1, other, SRA
IUCN Red List: Least Concern (Quadrula rumphiana), Least Concern
NatureServe: G5
other links: MolluscaBase
 Quadrula verrucosa (Rafinesque, 1820)
syonymy (8 available, 11 total) | specimens (4 + 9 Genbank vouchers)
Range: Widespread in the Interior and Gulf Coastal Plain, eastern North America. (North America)
Genbank sequences: 16S, 28S, 5.8S, COI, ITS1, ND1, other, SRA
NatureServe: G4 (Tritogonia verrucosa)
other links: MolluscaBase
Quadrula natosini (McLearn, 1929) (Cretaceous)
syonymy (1 available, 1 total) | specimens (0)
Quadrula primaevus (White, 1877) (Cretaceous)
syonymy (1 available, 1 total) | specimens (0)
Range: Cretaceous, North America.
other links: MolluscaBase
Quadrula subprimaevus (Dyer, 1930) (Cretaceous)
syonymy (1 available, 1 total) | specimens (0)
Range: Cretaceous, North America.
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