Pyrgulopsis bryantwalkeri, the Cortez Hills pebblesnail, is a species of minute 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. Description Pyrgulopsis bryantwalkeri is a small snail that has a height of and globose to ovate-conic shell. Its differentiated from other Pyrgulopsis in that its penial filament has a very weak lobe and short filament with the penial ornament consisting of a weakly developed terminal gland. References Molluscs of the United States bryantwalkeri Gastropods described in 1994