Quadrula

Quadrula
Quadrula intermedia
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Order:	Unionoida
Family:	Unionidae
Genus:	Quadrula

Quadrula is a genus of freshwater mussels, aquatic bivalve mollusks in the family Unionidae native to rivers of the American Midwest and mid-south. All have thick nacreous shells with well-developed hinge teeth, many also with external shell sculpturing of nodules or lumps.

Species within the genus Quadrula

Quadrula metanevra

Quadrula pustulosa

• southern mapleleaf (Quadrula apiculata)
• Alabama orb (Quadrula asperata)
• golden orb (Quadrula aurea)
• Rio Grande monkeyface (Quadrula couchiana)
• rabbitsfoot (Quadrula cylindrica)
• winged mapleleaf (Quadrula fragosa)
• smooth pimpleback (Quadrula houstonensis)
• Cumberland monkeyface pearly mussel (Quadrula intermedia)
• Suwannee Pigtoe (Quadrula kleiniana)
• monkeyface (Quadrula metanevra)
• gulf mapleleaf (Quadrula nobilis)
• wartyback (Quadrula nodulata)
• Texas pimpleback (Quadrula petrina)
• pimpleback (Quadrula pustulosa)
• mapleleaf (Quadrula quadrula)
• purple pimpleback (Quadrula refulgens)
• ridged mapleleaf (Quadrula rumphiana)
• Appalachian monkeyface pearly mussel (Quadrula sparsa)
• stirrup shell (Quadrula stapes)
• purple pigtoe (Quadrula succissa)
• rough rockshell (Quadrula tuberosa)

References

• Turgeon, D.D., J.F. Quinn,Jr., A.E. Bogan, E.V. Coan, F.G. Hochberg, W.G. Lyons, et al. 1998. Common and scientific names of aquatic invertebrates from the United States and Canada: Mollusks, 2nd ed. American Fisheries Society Special Publication 26: pages 526. American Fisheries Society.