| Reverse pebblesnail | |
|---|---|
| Scientific classification   | |
| Kingdom: | Animalia | 
| Phylum: | Mollusca | 
| Class: | Gastropoda | 
| Subclass: | Caenogastropoda | 
| Order: | Littorinimorpha | 
| Family: | Lithoglyphidae | 
| Genus: | Somatogyrus | 
| Species: | †S. alcoviensis | 
| Binomial name | |
| †Somatogyrus alcoviensis  Krieger, 1972 | |
The reverse pebblesnail, scientific name Somatogyrus alcoviensis, is a species of small freshwater snail with a gill and an operculum, an aquatic gastropod mollusc in the family Hydrobiidae.
This species is endemic to Newton County, Georgia [3] in the United States, where it occurs in the Alcovy and Yellow Rivers. It was believed extinct until it was rediscovered in a 2000 survey. [1]