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Pristinicola hemphilli

(Pilsbry, 1890)

Pristine Pyrg

G3Vulnerable Found in 1 roadless area NatureServe Explorer →

G3VulnerableGlobal Rank

Data deficientIUCN

HighThreat Impact

Identity

Unique IDELEMENT_GLOBAL.2.119613

Element CodeIMGASX0010

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryInvertebrate Animal

IUCNData deficient

Endemicendemic to a single nation

KingdomAnimalia

PhylumMollusca

ClassGastropoda

OrderLittorinimorpha

FamilyLithoglyphidae

GenusPristinicola

Synonyms

Bythinella hemphilliPilsbry, 1890

Concept Reference

Turgeon, D. D., J. F. Quinn, Jr., A. E. Bogan, E. V. Coan, F. G. Hochberg, W. G. Lyons, P. M. Mikkelsen, R. J. Neves, C. F. E. Roper, G. Rosenberg, B. Roth, A. Scheltema, F. G. Thompson, M. Vecchione, and J. D. Williams. 1998. Common and scientific names of aquatic invertebrates from the United States and Canada: Mollusks. 2nd Edition. American Fisheries Society Special Publication 26, Bethesda, Maryland. 526 pp.

Conservation Status

Review Date2008-02-19

Change Date1999-09-14

Edition Date2011-03-16

Edition AuthorsCordeiro, J. (2011); Steiner, M. (1996)

Threat ImpactHigh

Range Extent5000-20,000 square km (about 2000-8000 square miles)

Number of Occurrences21 - 80

Rank Reasons

Fairly wide distribution in the lower Columbia and Snake river basin in Washington, Idaho, California, and Oregon; but occurrences are scattered. Some decline and extirpation has been noted locally but overall trend information is lacking.

Range Extent Comments

Fairly wide distribution in the lower Columbia and Snake river basin in Washington, Idaho, California, and Oregon (Hershler et al., 1994). Colonies are scattered through the Columbia and Snake River basins into western Idaho; and it can also be found in interior Oregon in the Deschutes, Umatilla, and John Day River basins; and also on the Rogue, Umpqua, and Smith River basins in southern Oregon and Del Norte Co. in northern California.

Occurrences Comments

In Idaho, populations occur in portions of the lower Snake and lower Salmon River drainages (Stagliano et al., 2007). From more recent surveys it is not known from the middle or upper Snake River or in Montana (Richards et al., 2005). In Oregon, it occurs in Baker, Clackamas, Grant, Harney, Hood, Jefferson, Josephine, Lane, Malheur, Multnomah, Sherman, Union Wallowa, and Wascoe Cos. (OBIS, 2010). Coastal drainages and undisturbed portions of the Willamette River basin may also contain some populations.

Threat Impact Comments

Habitat loss is the primary threat to the species. According to Frest and Johannes (1997) grazing is a prevalent cause of habitat degradation. Other causes include road construction and maintenance, damming and water diversion, and campground construction. Increased nutrient load in groundwater is also a potential threat to some populations.Diversions and groundwater pumping for campground, hatchery stock and domestic water supplies can induce hydrologic changes affecting flow of the small seeps and springs which P. hemphelli prefer. Additional damage has also been caused by urbanization, logging, road construction and maintenance, grazing, and flooding as a result of dam construction. At some sites in Grant County, Washington, excessive algae growth and loss of local populations has occurred due to nutrient-rich groundwater changing the water chemistry (WA NHP, pers. comm., 2011).

Ecology & Habitat

Habitat

It typically inhabits small springs or seeps and occasionally larger springs, spring outflow channels, and spring-influenced stream reaches. Springs are usually in semiarid sagebrush-dominated habitat with basalt wubstrates, but some sites are in dense Douglas fir forests. Habitat is characterized by cobble substrates, slow to moderate flows, and shallow, cold, clear water and are relatively undisturbed (Frest and Johannes, 1995). Current sites are dominated by small cold streams which are undisturbed (Frest and Johannes, 1999).

Other Nations (1)

United StatesN3

Province	Rank	Native
Oregon	S3	Yes
Washington	S2	Yes
California	S1	Yes
Idaho	S3	Yes

Roadless Areas (1)

Oregon (1)

Area	Forest	Acres
French Pete (a)	Willamette National Forest	1,668

References (9)

Freshwater Mollusk Conservation Society (FMCS). 2021. The 2021 checklist of freshwater gastropods (Mollusca: Gastropods) of the United States and Canada. Considered and approved by the Gastropods Names Subcommittee December 2020. Online: https://molluskconservation.org/MServices_Names-Gastropods.html
Frest, T.J. and E.J. Johannes. 1995b. Land snail survey of the lower Salmon River drainage, Idaho. Idaho Bureau of Land Management Technical Bulletin 97-18. 142 pp. plus appendices
Frest, T.J. and E.J. Johannes. 1999a. Mollusk survey of southwestern Oregon, with emphasis on the Rogue and Umpqua River drainages. Report prepared for the Oregon Natural Heritage Program, 821 SE 14th, Portland, Oregon 97214:278 pp. + appendices.
Frest, T.J. and E.J. Johannes. 1999b. Field guide to survey and manage freshwater mollusk species. Unpublished report BLM/OR/WA/PL-99/045+1792 to the Bureau of Land Management, Oregon State Office, September 1999. 117 pp.
Gaines, E. Zoology Data Manager, Oregon Natural Heritage Program, Oregon Field Office, Portland, Oregon. Pers. comm.
Hershler, R., T. J. Frest, E. J. Johannes, P. A. Bowler, and F. G. Thompson. 1994. Two new genera of Hydrobiid snails (Prosobranchia: Rissooidea) from the northwestern United States. The Veliger 37(3):221-43.
Oregon Biodiversity Information Center (OBIS). 2010. Rare, Threatened and Endangered Species of Oregon. Institute for Natural Resources, Portland State University, Portland, Oregon. 105 pp.
Stagliano, D.M., G.M. Stephens, and W.R. Bosworth. 2007. Aquatic invertebrate species of concern on USFS Northern Region lands. Report prepared for USDA Forest Service, Northern Region, Missoula, Montana. Montana Natural Heritage Program, Helena, Montana and Idaho Conservation Data Center, Boise, Idaho. Agreement number 05-CS-11015600-036. 95 pp. + app.
Turgeon, D. D., J. F. Quinn, Jr., A. E. Bogan, E. V. Coan, F. G. Hochberg, W. G. Lyons, P. M. Mikkelsen, R. J. Neves, C. F. E. Roper, G. Rosenberg, B. Roth, A. Scheltema, F. G. Thompson, M. Vecchione, and J. D. Williams. 1998. Common and scientific names of aquatic invertebrates from the United States and Canada: Mollusks. 2nd Edition. American Fisheries Society Special Publication 26, Bethesda, Maryland. 526 pp.