Amnicola cora
Amnicola cora is a species of very small freshwater snail which has an operculum, an aquatic prosobranch gastropod mollusc in the family Amnicolidae according to the taxonomy of the Gastropoda (Bouchet & Rocroi, 2005). This species is endemic to Arkansas in the United States. Its natural habitat is a single cave in  Independence County, Arkansas. It is threatened by habitat alteration. References

Amnicola
Gastropods described in 1979
Taxonomy articles created by Polbot
Endemic fauna of Arkansas