WThe birdwing pearlymussel is a rare species of freshwater mussel in the family Unionidae, the river mussels. This aquatic bivalve is native to Tennessee and Virginia in the United States. Its range has declined over 90%. It is a federally listed endangered species of the United States.
WCyclocardia borealis, or the northern cardita, is a species of bivalve mollusc in the family Carditidae. It can be found along the Atlantic coast of North America, ranging from the Arctic Ocean to Cape Hatteras.
WEpioblasma arcaeformis, the sugarspoon or arc-form pearly mussel, was a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels. No live individuals have been observed since the early 20th century and it is presumed to be extinct.
WEpioblasma brevidens, the Cumberlandian combshell, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae.
WFusconaia subrotunda, the long solid mussel or long solid naiad, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae.
WHippurites cornuvaccinum is a fossil saltwater clam, an extinct marine bivalve mollusk in the family Hippuritidae. These fossils occur in the Late Cretaceous deposits of southern Europe.
WLampsilis abrupta, the pink mucket or pink mucket pearly mussel, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels. This species is endemic to the United States.
WMedionidus acutissimus, the Alabama moccasinshell, is a species of freshwater mussel in the family Unionidae, the river mussels. It is native to Alabama, Mississippi, Georgia, Tennessee, and possibly Florida. It is a federally listed threatened species of the United States.
WMytilopsis leucophaeata is a species of small bivalve mollusc in the false mussel family, Dreissenidae. It is commonly known as Conrad's false mussel or the dark false mussel.
WPitar lupanaria is a species of marine bivalve mollusc in the family Veneridae, the Venus clams.
WPleurobema decisum, the southern clubshell, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels.
WRotundaria 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.
WYoldia limatula, commonly called the file yoldia, is a clam in the family Yoldiidae. It can be found along the Atlantic coast of North America, from the Gulf of St. Lawrence to New Jersey, as well as along the Pacific coast, from Alaska to San Diego.