Hershler, R. & Liu, H.-P. (2009). New species and records of Pyrgulopsis (Gastropoda: Hydrobiidae) from the Snake River basin, southeastern Oregon: further delineation of a highly imperiled fauna. Zootaxa. 2006: 1-22.
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Hershler, R. & Liu, H.-P.
2009
New species and records of <i>Pyrgulopsis</i> (Gastropoda: Hydrobiidae) from the Snake River basin, southeastern Oregon: further delineation of a highly imperiled fauna