The Hydrobiid Snail Genus Marstonia

Abstract

The recent species of Marstonia are revised, based on material in most major museum collections and on new material recently collected in the southeastern states. A total of eight species are recognized, of which five are described as new: M. arga, M ogmorhapha, and M. pachyta from the Tennessee River system; M. castor from the Flint River system, Georgia; and M. halcyon from the Ogeechee River system, Georgia. Five names are placed in the synonymy of Marstonia lustrica (Pilsbry): Amnicola oneida Pilsbry, A. winkleyi Pilsbry, A. perlustrica Baker, M. decepta Baker, and M. gelida Baker. M. olivacea is considered a distinct species of uncertain status and is probably extinct. Marstonia is placed in the subfamily Nymphophilinae and is most closely related to Cincinnatia. Other North American genera in Nymphophilinae include Fonticella, Notogillia, Spilochlamys, Rhapinema, Nymphophila, and Birgella.