Pyrgulopsis
Pyrgulopsis milleri
Pyrgulopsis deserta
Pyrgulopsis californiensis
Pyrgulopsis carinifera
Pyrgulopsis bryantwalkeri
Huachuca springsnail
Pyrgulopsis archimedis
Pyrgulopsis aardahli
Kingman springsnail
Duckwater pyrg
Pyrgulopsis perforata
Pyrgulopsis arizonae
Gila springsnail
Pyrgulopsis castaicensis
Pyrgulopsis blainica
Pyrgulopsis sanchezi
Montezuma Well springsnail
Pyrgulopsis licina
Moapa pebblesnail
Chupadera springsnail
Brown springsnail
Phantom cave snail
Pyrgulopsis bedfordensis
Grand Wash springsnail
Jackson lake springsnail
Page springsnail
Crystal Spring springsnail
Corded purg
Davis County springsnail
Fairbanks springsnail
Ash Meadows pebblesnail
Transverse grand pyrg
Fossil springsnail
Roswell springsnail
San Bernardino springsnail
Pyrgulopsis minkleyi
New Mexico hotspring snail
Bruneau hot springsnail
Pecos springsnail
South Sierra Nevada springsnail
Elongate-gland springsnail
Distal-gland springsnail
Verde Rim springsnail
Amargosa springsnail
Three Forks springsnail
Median-gland Nevada springsnail
Oasis Valley springsnail
Naegele springsnail
Socorro springsnail
Marstonia scalariformis
Marstonia pachyta
Marstonia olivacea
Marstonia castor
Marstonia ozarkensis
Marstonia ogmorhaphe
Marstonia agarhecta