Translations:AY Honors/Land and Freshwater Mollusks/Answer Key/52/en
From Pathfinder Wiki
Some freshwater bivalves have very restricted ranges. For example, the Ouachita creekshell mussel, Villosa arkansasensis, is known only from the streams of the Ouachita Mountains in Arkansas and Oklahoma, and like several other freshwater mussel species from the southeastern USA, it is in danger of extinction.
