Epioblasma biemarginata   (Lea)

Angled Riffleshell
(Epioblasma biemarginata)

syn. Dysnomia biemarginata (Lea), Margaron biemarginatus (Lea), Plagiola biemarginata (Lea), Truncilla biemarginata (Lea), Unio biemarginatus (Lea)


USA: Colbert County, Jackson County, Lauderdale County, Madison County / Alabama; Pulaski County / Kentucky; Hancock County, Knox County, Lincoln County, Sequatchie County / Tennessee

local name:

Angled Riffleshell (English)

size: (?)

extinction date: last seen in 1970

The Angled Riffleshell was formerly found in several rivers, among them the Flint, the Paint Rock and the Tennessee River in Alabama, parts of the Cumberland River in Kentucky as well as the Clinch, the Holston, the Elk- and the Sequatchie River in Tennessee.

The habitiat of this species was destroyed by the building of several dams.

One of the last surviving populations of this species was found in 1967 for the last time, the last specimen was seen in the year 1970.