[2] It is a federally listed endangered species of the United States.

[3] This mussel is up to 4 centimeters long or occasionally larger and has a thin, fragile, dark brown or yellow-brown shell.

[3] This mussel is native to the Mobile River drainage, where it was once sporadic but widespread.

This species is rare except in Polk County, Tennessee, where it is locally common in the Conasauga River.

It is in severe decline, having been extirpated from much of the Coosa River system and all of the waterways in Alabama where it once occurred.