Pyrgulopsis bryantwalkeri
Pyrgulopsis bryantwalkeri, the Cortez Hills pebblesnail, is a species of small freshwater snail with an operculum, aquatic gastropod molluscs or micromolluscs in the family Hydrobiidae.
This species' natural habitat is springs. It is endemic to a spring in the Cortez foot-hills, Elko County, Nevada, United States.