Pyrgulopsis ruinosa Hershler, 1998

Fish Lake pyrg, Fish Lake Valley pyrg



Taxonomy & Nomenclature



Conservation Status


Last record: 1988 or earlier (Hershler, 1998); 1993 (Suckling et al. 2004)



Spring southwest of The Crossing, Fish Lake Valley, Esmeralda County, Nevada (Hershler & Liu, 2017:53)


Biology & Ecology




Holotype: USNM 874307

Paratypes: USNM 860700






Original scientific description:

Hershler, R. (1998). A systematic review of the hydrobiid snails (Gastropoda: Rissooidea) of the Great Basin, western United States. Part I. Genus Pyrgulopsis. The Veliger 41(1): 1-132.


Other references:

Cowie, Robert H., Régnier, Claire, Fontaine, Benoît, and Bouchet, Philippe. (2017). Measuring the Sixth Extinction: what do mollusks tell us? The Nautilus 131(1): 3-41.

Hershler, Robert and Liu, Hsiu-Ping. (2017). Annotated Checklist of Freshwater Truncatelloidean Gastropods of the Western United States, with an Illustrated Key to the Genera.  Technical Note 449. U.S. Department of the Interior, Bureau of Land Management, National Operations Center, Denver, CO.

Régnier, Claire, Fontaine, Benoît and Bouchet, Philippe. (2009). Not Knowing, Not Recording, Not Listing: Numerous Unnoticed Mollusk Extinctions. Conservation Biology 23(5): 1214-1221.

Sada, D.W. and G.L. Vinyard. 2002. Anthropogenic changes in biogeography of Great Basin aquatic biota. Pages 277-294 IN Great Basin Aquatic Systems History (R. Hershler, D. B. Madsen and D. R. Currey eds. 2002. Smithsonian Contributions to the Earth Sciences 33.

Suckling, Kieran, Slack, Rhiwena and Nowicki, Brian. (2004). Extinct and the Endangered Species Act. Centre For Biological Diversity. 63 pp.


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