| Quadrula | |
|---|---|
 | |
| Quadrula fragosa | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Bivalvia |
| Order: | Unionida |
| Family: | Unionidae |
| Tribe: | Quadrulini |
| Genus: | Quadrula Rafinesque, 1820 |
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. [1] Species currently in Quadrula now consist of: [2]
The Unionidae are a family of freshwater mussels, the largest in the order Unionida, the bivalve molluscs sometimes known as river mussels, or simply as unionids.
Unionida is a monophyletic order of freshwater mussels, aquatic bivalve molluscs. The order includes most of the larger freshwater mussels, including the freshwater pearl mussels. The most common families are the Unionidae and the Margaritiferidae. All have in common a larval stage that is temporarily parasitic on fish, nacreous shells, high in organic matter, that may crack upon drying out, and siphons too short to permit the animal to live deeply buried in sediment.
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.
The winged mapleleaf, also known as false mapleleaf, or hickory nut shell, and with the scientific name Quadrula fragosa, is a species of freshwater mussel. It is an aquatic bivalve mollusk in the family Unionidae, the river mussels. It is endemic to 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 stapes, the stirrup shell or stirrupshell, was a species of bivalve in the family Unionidae. It was endemic to eastern Mississippi and western Alabama in the United States. It was last observed in 1987 and was proposed for delisting due to extinction by the US Fish and Wildlife Service in 2021.
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, the pimpleback, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels. This species is native to North America, where it is widespread and common. It has possibly been extirpated from New York, however, and populations in Pennsylvania are critically imperiled, according to NatureServe.
Rotundaria refulgens, the purple pimpleback, is a species of freshwater mussel.
Rotundaria succissa is a species of bivalve in the family Unionidae.
Theliderma is a genus of freshwater mussels, aquatic bivalve mollusks in the family Unionidae. They are native to North America.
Fusconaia mitchelli, the false spike, is a species of freshwater mussel, an aquatic bivalve mollusc 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.
| Authority control databases: National |
|---|
 | This Unionidae-related article is a stub. You can help Wikipedia by expanding it. |
