| Rabbitsfoot, Winged mapleleaf, Quadrula metanevra, Appalachian monkey‑face pearly mu, Cumberland monkeyface pearly mu|
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.
In 2012, many species classified as Quadrula were moved to Rotundaria and Theliderma based on genetic and morphological evidence. Species currently in Quadrula now consist of:Southern mapleleaf (Quadrula apiculata)
Winged mapleleaf (Quadrula fragosa)
Gulf mapleleaf (Quadrula nobilis)
Mapleleaf (Quadrula quadrula)
Ridged mapleleaf (Quadrula rumphiana)
Pistolgrip (Quadrula verrucosa)