The Dreissenidae are a family of small freshwater mussels, aquatic bivalve molluscs. They attach themselves to stones or to any other hard surface using a byssus. The shells of these bivalves are shaped somewhat like those of true mussels, and they also attach themselves to a hard substrate using a byssus, however this group is not at all closely related to true mussels, being more closely related to the venus clams (Veneridae).
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.
Unio is a genus of medium-sized freshwater mussels, aquatic bivalve mollusks in the family Unionidae, the river mussels. They are found throughout Europe, Africa, and the Middle East, with some species introduced to East Asia. Fossil species are also known from the Jurassic of North America.
Anodontoides radiatus is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels. In 2018, Smith, Johnson, Pfeiffer and Gangloff placed this species in genus Strophitus on the basis of morphological and molecular features. As of 2023, it is under review for listing under the Endangered Species Act of 1973.
Anodontoides is a genus of freshwater mussels, an aquatic bivalve mollusk in the family Unionidae, the river mussels.
Elliptio is a genus of medium- to large-sized freshwater mussels, aquatic bivalve mollusks in the family Unionidae, commonly known as the unionids, freshwater mussels or naiads.
The brother spike is a species of freshwater mussel the family Unionidae, the river mussels. This species is endemic to the Savannah River, United States. It listed as "endangered "in 1996 and was changed due to insufficient information and it has a world listing of "critically imperilled/imperilled".
The Tar River spiny mussel or Tar River spinymussel is a species of freshwater mussel in the family Unionidae, the river mussels. This species is endemic to North Carolina in the United States. This species is endemic to North Carolina in the United States. It is expected to become extinct without significant human intervention. Under the Endangered Species Act, this species is listed as endangered in the United States.
Atlanticoncha ochracea, the tidewater mucket, is a species of freshwater mussel, an aquatic bivalve mollusc in the family Unionidae, the river mussels. Formerly classified in the now-defunct genus Leptodea, it is now considered the only member of the monotypic genus Atlanticoncha.
The highnut was a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels.
Pleurobema is a genus of freshwater mussels, aquatic bivalve mollusks in the family Unionidae, the river mussels.
Pleurobema clava, the clubshell, club naiad or clubshell pearly mussel, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels.
The James River spinymussel, also known as the Virginia spinymussel, is a species of freshwater mussel in the family Unionidae, the river mussels. This species is native to North Carolina, Virginia, and West Virginia in the United States. It is a federally listed endangered species of the United States. It was formerly placed in Pleurobema but in 2017, Perkins, Johnson & Gangloff placed the species into a new genus Parvaspina on account of genetic data and its lateral spines.
Pleurobema marshalli, the flat pigtoe or Marshall's mussel, was a species of freshwater mussel in the family Unionidae, the river mussels. It was native to Alabama and Mississippi, but it has not been seen since 1980. Though it is still listed as critically endangered on the IUCN Red List and as an endangered species on the US Endangered Species List, it is likely extinct.
Pleurobema oviforme, the Tennessee clubshell, is a species of freshwater mussel in the family Unionidae, the river mussels. It is native to the eastern United States, where it occurs in Alabama, Kentucky, North Carolina, Tennessee, and Virginia. It also previously occurred in Mississippi.
Pleurobema taitianum, the heavy pigtoe or Judge Tait's mussel, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels.
Paetulunio fabalis, the rayed bean, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels. It is the only species in the genus Paetulunio, and was formerly classified in Villosa until a 2018 study.
The eastern elliptio is a freshwater mussel in the Unionidae family, native to Canada and the United States. It is a bivalve member of the phylum Mollusca. Not only is it found in Canada and the United States, but it is frequently the most abundant species of mussel found in its home waterways. It is the most common mussel in the Delaware River and the most common mussel found in the state of New Hampshire and Vermont. It can be found in the substrate at the bottom of lakes, ponds and rivers. Size is variable, but can reach up to 13 centimetres (5.1 in) in length.
The Canoe Creek clubshell, also known as the Canoe Creek pigtoe, is an endangered species of freshwater mussel, an aquatic bivalve mollusc in the family Unionidae, the river mussels.
Ambleminae is a subfamily of freshwater mussel in the family Unionidae. They are found throughout much of eastern North America south to Central America, although fossils are also known from Siberia. Some species have also been introduced to East Asia. They are the most speciose radiation of the Unionidae, with more than 300 species.
