Rotundaria succissa

Rotundaria succissa is a species of bivalve in the family Unionidae.

Rotundaria succissa
Conservation status
Least Concern  (IUCN 3.1)[1]
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Order:	Unionida
Family:	Unionidae
Genus:	Rotundaria
Species:	R. succissa
Binomial name
Rotundaria succissa (I. Lea, 1852)
Synonyms
Quadrula succissa (I. Lea, 1852)

It is native to the United States, where it is endemic to the Apalachicolan Region of Alabama and Florida. Here, it is found in the Choctawhatchee, Escambia, and Yellow River systems. It is considered to be a somewhat "hardy" mussel in terms of tolerating poor water quality, and its populations appear to be stable.^[2]

It was formerly classified under Quadrula, but in 2012 it was moved to Rotundaria based on genetic evidence.^[3]