Pyrgulopsis ruinosa (Fish Lake Valley Pyrg)

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The Fish Lake pyrg (Pyrgulopsis ruinosa) is endemic to a single spring on McNett Ranch in
Fish Lake Valley and is known only from the type specimen collected on July 16, 1988 [242,
153]. The spring was impounded in the late 1980s or more likely the early 1990s [153].
Sada and Vinyard report an extinction date of 1990 [196], but it is not clear if this is the date
last seen or the presumed date of extinction. The species has not been found in subsequent
surveys, and the landowner has not allowed recent surveys [153]. The pyrg's species
designation is from the latin ruinosa "going to ruin; referring to the current status of the
species" [242].

[another specialist]

49 new springsnails for Nevada (18 Dec 1998): The Great Basin’s small freshwater gastropods (Family Hydrobiidae) have until recently been poorly known. Robert Hershler (1998) of the Smithsonian Institution has now described 49 new springsnails in the Great Basin portion of Nevada, greatly increasing the known gastropod diversity of the State. The typical habitats of western springsnails are usually very small springs that are often less than 1 m wide and 1 cm deep. Because such springs often are unprotected and highly vulnerable to impacts from water development and livestock activities, the Nevada Natural Heritage Program considers the new species sensitive and has started tracking their status. Twenty-two (45%) of the newly described Nevada Great Basin springsnails are known worldwide from only single locations, many of which have already experienced significant impacts. Already, 2 of the newly described springsnails are extinct: the Fish Lake Valley springsnail, Pyrgulopsis ruinosa, and the carinate Duckwater springsnail, Pyrgulopsis carinata. Keep watching the Nevada Sensitive Animal List for updates on the remaining species.

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

66.102.7.104/search?q=cache:YaPJDJSiRVcJ:heritage.nv.gov/news.htm+Pyrgulopsis+ruinosa&hl=es

[another specialist]

also known as Nevada freshwater shrimp

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sometimes called, carinate Duckwater pyrg.

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Fish Lake Valley pyrg

[another specialist]

Rounded Global Status: GX - Presumed Extinct
Reasons: The spring where this snail was back in 1988 is severely degraded and no snails were found on subsequent visits (Hershler 1998).

Global Range Comments: Only collected from the type locality in one spring in Esmeralda County, Nevada (Hershler 1998).

www.natureserve.org/

[Sebbe]

Hershler, R. and H.-P. Liu. 2017. Annotated checklist of freshwater truncatelloidean gastropods
of the western United States, with an illustrated key to the genera. Technical Note 449.

Pyrgulopsis ruinosa Hershler, 1998
Pyrgulopsis ruinosa Hershler, 1998: 54-56, figs. 7A, 18M, 31A-C. Spring southwest of
The Crossing, Fish Lake Valley, Esmeralda County, Nevada. Holotype,
USNM 874307; paratypes, USNM 860700.
Common name: Fish Lake Valley pyrg.
Distribution: Known only from the type locality and may now be extinct (Hershler
1998).

repository.si.edu/handle/10088/35012

[koeiyabe]

explorer.natureserve.org/servlet/NatureServe?searchSpeciesUid=ELEMENT_GLOBAL.2.107800