Elimia alabamensis
The mud elimia, scientific name Elimia alabamensis, is a species of freshwater snail with a gill and an operculum, a  gastropod mollusc in the family Pleuroceridae. This species is endemic to Alabama in  the United States. References 

Pleuroceridae
Gastropods described in 1861
Taxonomy articles created by Polbot
Taxa named by Isaac Lea
Endemic fauna of Alabama