Median-gland Nevada Springsnail
Pyrgulopsis pisteri
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Displaying items 179677-179688 of 180876 in total
Fossil Springsnail
Pyrgulopsis simplex
Brown Springsnail
Pyrgulopsis sola
Quadrasiella clathrata
Quadrasiella mucronata
Quadrula fragosa
Theliderma sparsa
Theliderma stapes
Cyclonaias asperata
Quadrula couchiana
Cyclonaias houstonensis
Cyclonaias refulgens