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