Shale pebblesnail

The shale pebblesnail (Somatogyrus pennsylvanicus) is a species of very small freshwater snail with an operculum. It is an aquatic gastropod mollusc in the family Lithoglyphidae.

Shale pebblesnail
Conservation status
Vulnerable  (NatureServe)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Littorinimorpha
Family:	Lithoglyphidae
Genus:	Somatogyrus
Species:	S. pennsylvanicus
Binomial name
Somatogyrus pennsylvanicus Walker, 1904

Distribution

This species is endemic to rivers in Pennsylvania, Virginia and West Virginia in the United States.^[1]