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Sharp sprite
Promenetus exacuous
NatureServe conservation status
Global (G-rank): G5
State (S-rank): S2
External links
Species range
Previous Rating: CE - 250-20,000 sq km. -George V. Oliver 1998-06-26.
All reports of this species in Utah are from the north-central part of the state (Cache, Weber, Davis, Salt Lake, extreme western Summit, and Utah counties [Call 1884, Henderson and Daniels 1917, Chamberlin and Jones 1929, Jones 1940]) except for one documented locality in south-central Utah (Sevier County [Chamberlin and Jones 1929, Chamberlin and Berry 1930]).
Habitat
Most Utah records of this species have been from lakes (see, for example, Call 1884, Chamberlin and Jones 1929, Jones 1940), though it has also been collected from a reservoir in Utah (Henderson and Daniels 1917).
Threats or limiting factors
The extirpation of this species from Utah Lake is indicative of the threatened status of this species in Utah. All but one of the reported Utah localities for the species are in the portion of the state that is undergoing the most rapid and intensive development (i.e., north-central Utah). This is resulting in the loss and degradation of natural habitats, especially wetlands, which is almost certainly a threat to this aquatic gastropod. Even the one reported Utah occurrence of this species that is not in north-central Utah is from a locality, Fish Lake, that, though not obviously impacted by human activities, has experienced within this century the extinction of an aquatic gastropod species that was formerly endemic to this one water body (the Fish Lake physa, PHYSELLA MICROSTRATA), which suggests that other native aquatic mollusks, including this species may not be secure in Fish Lake.
