Pygmy pebblesnail
The pygmy pebblesnail, scientific name Somatogyrus pygmaeus, is a species of very small or minute freshwater snail with a gill and an operculum, an aquatic gastropod mollusc in the family Lithoglyphidae. This species is endemic to Alabama in  the United States. Its natural habitat is the Coosa River. References

Molluscs of the United States
Somatogyrus
Gastropods described in 1909
Taxonomy articles created by Polbot
Endemic fauna of Alabama