Phantom cave snail

The phantom cave snail or phantom cavesnail is a species of very small freshwater snail with an operculum, an aquatic gastropod in the family Hydrobiidae.

Distribution

This species is endemic to the lower Pecos River basin, Texas, the List of non-marine molluscs of [the United States|United States].

Genus transfer

When originally described in 1935, the phantom cave snail was assigned to the genus Cochliopa. Following a detailed examination of shell and anatomical characteristics along with genetic sequencing it was transferred to the genus Pyrgulopsis in 2010.