Epioblasma biemarginata

Epioblasma biemarginata, the angled riffleshell, was a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels. It is now extinct.

Epioblasma biemarginata
Conservation status
Extinct  (IUCN 2.3)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Order:	Unionida
Family:	Unionidae
Genus:	Epioblasma
Species:	†E. biemarginata
Binomial name
†Epioblasma biemarginata (I. Lea, 1857)
Synonyms
Dysnomia biemarginata I. Lea, 1857

This species was endemic to the drainages of the Cumberland River and the Tennessee River in the United States. It was known from several locations in Kentucky, Tennessee, and Alabama. Its natural habitat was shallow, fast moving water of major rivers. It became extinct due to habitat loss, as the rivers were dammed and diverted.^[2] The last live individual was seen in 1970, at Muscle Shoals on the Tennessee River.^[3][4]