Atlas pebblesnail
The atlas pebblesnail (Somatogyrus humerosus) is a species of minute freshwater snail that has an operculum, an aquatic operculate gastropod micromollusc in the family Lithoglyphidae. This species is endemic to the Alabama in the United States. Its natural habitat is the Tennessee River around Florence, Alabama, but it has not been collected recently. References

Somatogyrus
Gastropods described in 1906
Taxonomy articles created by Polbot
Endemic fauna of Alabama