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.

Quadrula
Quadrula fragosa
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Bivalvia
Order: Unionida
Family: Unionidae
Tribe: Quadrulini
Genus: Quadrula
Rafinesque, 1820

Species within the genus Quadrula

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In 2012, many species classified as Quadrula were moved to Rotundaria and Theliderma based on genetic and morphological evidence.[1] Species currently in Quadrula now consist of:[2]

 
Quadrula verrucosa

References

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  1. ^ Campbell, David; Lydeard, Charles (2012). "The Genera of Pleurobemini (Bivalvia: Unionidae: Ambleminae)". American Malacological Bulletin. 30 (1): 19–38.
  2. ^ Quadrula World Register of Marine Species