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