Sparrow pebblesnail
The sparrow pebblesnail, scientific name Somatogyrus parvulus, 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 Tennessee in the United States. Its natural habitat is the Powell River. References

Endemic molluscs of the United States
Somatogyrus
Gastropods described in 1865
Taxa named by George Washington Tryon
Taxonomy articles created by Polbot
Endemic fauna of Tennessee