Fg. Thompson, A NEW FRESH-WATER SNAIL FROM THE COOSA RIVER, ALABAMA (GASTROPODA, PROSOBRANCHIA, HYDROBIIDAE), Proceedings of the Biological Society of Washington, 108(3), 1995, pp. 502-507
Pyrgulopsis hecshleri, a new species, is described from the Coosa Rive
r, Alabama. It is closely related to three species from the Tennessee
River system of northern Alabama. It is distinguished by characteristi
cs of the shell and soft anatomy. The new species was incorrectly iden
tified in earlier literature as Amnicola olivacea Pilsbry, 1895 (= Pyr
gulopsis olivacea).