Pyrgulopsis
Pyrgulopsis milleri
Pyrgulopsis californiensis
Pyrgulopsis deserta
Pyrgulopsis carinifera
Huachuca springsnail
Pyrgulopsis bryantwalkeri
Pyrgulopsis aardahli
Pyrgulopsis archimedis
Kingman springsnail
Duckwater pyrg
Pyrgulopsis perforata
Pyrgulopsis arizonae
Pyrgulopsis castaicensis
Pyrgulopsis blainica
Gila springsnail
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
Roswell springsnail
Transverse grand pyrg
Fossil springsnail
San Bernardino springsnail
Bruneau hot springsnail
Pecos springsnail
New Mexico hotspring snail
Pyrgulopsis minkleyi
Elongate-gland springsnail
South Sierra Nevada springsnail
Distal-gland springsnail
Verde Rim springsnail
Median-gland Nevada springsnail
Oasis Valley springsnail
Amargosa springsnail
Three Forks springsnail
Naegele springsnail
Socorro springsnail
Marstonia scalariformis
Marstonia pachyta
Marstonia olivacea
Marstonia castor
Marstonia ozarkensis
Marstonia ogmorhaphe
Marstonia agarhecta