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.
Rotundaria couchiana, the Rio Grande monkeyface, is a species of freshwater mussel. It is native to Chihuahua, Mexico and New Mexico and Texas in the United States.
Rotundaria houstonensis, the smooth pimpleback, is a species of freshwater mussel native to the United States. It is endemic to the Colorado and Brazos River drainages in Texas.
Theliderma intermedia, the Cumberland monkeyface pearly mussel or Cumberland monkeyface, is a species of freshwater mussel in the family Unionidae, the river mussels. This aquatic bivalve mollusk is native to Tennessee and Virginia in the United States. Historically widespread in the upper Tennessee River system, it populations have been reduced by habitat destruction and pollution. It now only occurs in two tributaries: the Duck and Powell Rivers. It is a federally listed endangered species.
Quadrula quadrula, the mapleleaf, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels.
Quadrula rumphiana, the ridged mapleleaf, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels.
Theliderma sparsa, the Appalachian monkey-face pearly mussel or Appalachian monkeyface, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels.
Theliderma stapes, the stirrup shell or stirrupshell, is a species of bivalve in the family Unionidae. It is endemic to eastern Mississippi and western Alabama in the United States, though it is potentially extinct, as it was last observed in 1987.
The southern mapleleaf is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels.
Rotundaria asperata, the Alabama orb, is a species of freshwater mussel, an aquatic bivalve mollusk.
Rotundaria aurea, the golden orb, is a species of freshwater mussel. It is native to the United States, where it is found only in Texas.
The rabbitsfoot is a species of freshwater mussel. It is an aquatic bivalve mollusk, in the family Unionidae, the river mussels.
The sculptured pigtoe is a species of freshwater mussel native to the United States. It is endemic to the Apalachicola and Ochlockonee River systems in the states of Alabama, Florida, and Georgia.
Cyclonaias pustulosa is a species of freshwater mussels, aquatic bivalve mollusks in the family Unionidae, the river mussels. This species is native to North America, where it is a widespread and common.
Rotundaria is a genus of freshwater mussels, aquatic bivalve mollusks in the family Unionidae, the river mussels.
Rotundaria refulgens, the purple pimpleback, is a species of freshwater mussel.
Rotundaria tuberculata, commonly called the purple wartyback, is a freshwater mussel, an aquatic bivalve mollusk.
Fusconaia mitchelli, the false spike, is a species of freshwater mussel, an aquatic bivalve mollusc in the family Unionidae, the river mussels.
Theliderma metanevra, common name the monkeyface, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels.
Theliderma tuberosa, the rough rockshell, is a species of freshwater mussel. It is an aquatic bivalve mollusk in the family Unionidae, the river mussels. It has sometimes been treated as a variety or big-river ecotype of Theliderma metanevra, due to only having slight shell differences.
