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