Identity
Unique IDELEMENT_GLOBAL.2.104572
Element CodeAFBAA02070
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVertebrate Animal
IUCNVulnerable
Endemicendemic to a single state or province
KingdomAnimalia
PhylumCraniata
ClassPetromyzontida
OrderPetromyzontiformes
FamilyPetromyzontidae
GenusEntosphenus
SynonymsLampetra minimaBond and Kan, 1973
Other Common NamesMiller Lake lamprey (EN)
Concept ReferenceRobins, C.R., R.M. Bailey, C.E. Bond, J.R. Brooker, E.A. Lachner, R.N. Lea, and W.B. Scott. 1991. Common and scientific names of fishes from the United States and Canada. American Fisheries Society, Special Publication 20. 183 pp.
Taxonomic CommentsThought to have evolved from a stock of L. tridentata isolated in Miller Lake after the explosion of Mt. Mazama about 6,600 years ago (Kan and Bond 1981, Miller et al. 1989). However, subsequent data indicate a more ancient separation and a sister relationship with L. lethophaga (Lorion et al. 2000).
Conservation Status
Rank MethodExpertise without calculation
Review Date2012-02-22
Change Date2012-02-22
Edition Date2012-02-22
Edition AuthorsHammerson, G.
Range Extent1000-5000 square km (about 400-2000 square miles)
Number of Occurrences6 - 20
Rank ReasonsFormerly thought to be endemic to Miller Lake, Oregon, where exterminated in early 1950s through chemical control measures; recent surveys documented this species in several areas within and outside the Miller Lake subbasin in Oregon; no immediate threats. G3 rank was confirmed using NatureServe's Rank Calculator version 7.31.
Range Extent CommentsFormerly this species was thought to be endemic to Miller Lake (16 km northeast of Mt. Thielson), Klamath County, Oregon (Lee et al. 1980), where the species was last collected in the early 1950s. Recent surveys documented populations in Miller Creek, Jack Creek, and the upper sections of the Williamson and Sycan rivers, in the upper Klamath River Basin, Klamath and Lake counties, Oregon (Lorion et al. 2000, Page and Burr 2011).
Occurrences CommentsLorion et al. (2000) mapped 8 collection sites; these represent probably a half-dozen subpopulations or locations (Oregon Department of Fish and Wildlife 2005).
Threat Impact CommentsMiller Lake was chemically treated with toxaphene by the Oregon Game Commission on September 16,1958 to eliminate tui chub and lampreys (Oregon Department of Fish and Wildlife 2005).
No immediate threats are known (Kostow 2002). Potential threats include impacts from stocked fishes, entrainment in water diversions, and impaired connectivity within and between local populations (Oregon Department of Fish and Wildlife 2005).