Elongate-gland Springsnail

Pyrgulopsis isolata

Page Springsnail

Pyrgulopsis morrisoni

Distal-gland Springsnail

Pyrgulopsis nanus

Pecos Springsnail

Pyrgulopsis pecosensis

Median-gland Nevada Springsnail

Pyrgulopsis pisteri

Fossil Springsnail

Pyrgulopsis simplex

Brown Springsnail

Pyrgulopsis sola

Quadrasiella clathrata

Quadrasiella mucronata

Quadrula fragosa

Theliderma sparsa

Theliderma stapes