https://www.fws.gov/species/round-rocksnail-leptoxis-ampla
Round Rocksnail (Leptoxis ampla) | U.S. Fish & Wildlife Service
The round rocksnail is a member of the Pleuroceridae family and has a subglobose shell, with an ovately rounded aperture and grows to about 20mm (0.8 inches)...
round rocksnailleptoxis amplafishwildlifeservice