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Lednia tumana

(Ricker, 1952)

Mist Forestfly

G1Critically Imperiled (G1G2) Found in 1 roadless area NatureServe Explorer →
G1Critically ImperiledGlobal Rank
Not evaluatedIUCN
HighThreat Impact
Meltwater lednian stonefly (Lednia tumana). Photo by U.S. Fish & Wildlife Service, Public Domain (U.S. Government Work), via ECOS.
U.S. Fish & Wildlife Service, https://www.usa.gov/government-works
Identity
Unique IDELEMENT_GLOBAL.2.907177
Element CodeIIPLE0K010
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryInvertebrate Animal
IUCNNot evaluated
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomAnimalia
PhylumArthropoda
ClassInsecta
OrderPlecoptera
FamilyNemouridae
GenusLednia
Other Common Names
Meltwater Forestfly (EN) Meltwater Lednian Stonefly (EN) Némoure brumeuse (FR)
Concept Reference
Baumann, R.W., and B.C. Kondratieff. 2010. The stonefly genus Lednia in North America (Plecoptera: Nemouridae). Illiesia 6(25):315-327. Available online: http://www2.pms-lj.si/illiesia/papers/Illiesia06-25.pdf.
Taxonomic Comments
Prior to the description of new species by Baumann and Kondratieff (2010) and Baumann and Call (2012), the genus Lednia included a single species, L. tumana, restricted to the Glacier-Waterton Lakes International Peace Park region spanning the border of northern Montana and southern Alberta.
Conservation Status
Rank MethodLegacy Rank calculation - Biotics v1
Review Date2019-12-05
Change Date2009-08-25
Edition Date2019-12-05
Edition AuthorsStagliano, D.
Threat ImpactHigh
Range Extent5000-20,000 square km (about 2000-8000 square miles)
Number of Occurrences81 - 300
Rank Reasons
A globally restricted range and the high threats from climate change make this species vulnerable to global extinction or extirpation.

The USFWS listed this species as threatened under the Endangered Species Act in November 2019.
Range Extent Comments
This species is found in the Northern Rocky Mountains of the US and Canada. Range extends from Banff National Park, Alberta and north through Glacier National Park, Montana, and has been documented as far south as the Mission Mountains of north-central Montana (Baumann and Kondratieff 2010; Muhlfeld et al. 2011).
Occurrences Comments
These occurrences have mostly been recently documented and confirmed in the last 10 years.
Threat Impact Comments
Threats from glacier retreat due to climate change is ongoing and is predicted to increase in the next decade.
Ecology & Habitat

Habitat

Occurs in very cold glacial meltwater streams. Immatures usually on undersides of rocks (typically 40-100 cm diameter) or on pieces of bark or wood. Adults apparently emerge in August when temperatures reach 10 degrees C.

Reproduction

Adults emerge in Glacier National Park between July and August (Gaufin et al., 1972).
Other Nations (2)
United StatesN1
ProvinceRankNative
MontanaS1Yes
CanadaNU
ProvinceRankNative
AlbertaSUYes
Threat Assessments
ThreatScopeSeverityTiming
11 - Climate change & severe weatherPervasive (71-100%)Serious or 31-70% pop. declineHigh (continuing)

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Roadless Areas (1)
Montana (1)
AreaForestAcres
Bmss Ra 1485Flathead National Forest334,275
References (18)
  1. Baumann, R.W., and B.C. Kondratieff. 2010. The stonefly genus <i>Lednia </i>in North America (Plecoptera: Nemouridae). Illiesia 6(25):315-327. Available online: http://www2.pms-lj.si/illiesia/papers/Illiesia06-25.pdf.
  2. Baumann, R. W. and K. W. Stewart. 1980. The nymph of <i>Lednia tumana</i> (Ricker) (Plecoptera:Nemouridae). Proc. Entomol. Soc. Wash. 82(4): pp. 655-659.
  3. DeWalt, R. E, H. Hopkins, U. Neu-Becker, and G. Stueber. 2023. Plecoptera Species File. Online. Available: https://plecoptera.speciesfile.org
  4. Donald, D.B. and R.S. Anderson. 1977. Distribution of stoneflies (Plecoptera) of the Waterton River drainage, Alberta, Canada. Syesis 10:111-120.
  5. Gaufin, A.R., E.R. Ricker, M. Miner, P. Milam, and R.A. Hays. 1972. The stoneflies (Plecoptera) of Montana. Transactions of the American Entomological Society 98(1):1-161.
  6. Jordan, S., J.J. Giersch, C.C. Muhlfeld, S. Hotaling, L. Fanning, T.H. Tappenbeck, and G. Luikart. 2016. Correction: Loss of genetic diversity and increased subdivision in an endemic alpine stonefly threatened by climate change. PLOS ONE 11(7): e0159931. https://doi.org/10.1371/journal.pone.0159931
  7. Jordan, S., J.J. Giersch, C.C. Muhlfeld, S. Hotaling, L. Fanning, T.H. Tappenbeck, and G. Luikart. 2016. Loss of genetic diversity and increased subdivision in an endemic alpine stonefly threatened by climate change. PLoS ONE 11(6): e0157386. https://doi.org/10.1371/journal.pone.0157386
  8. Kondratieff, B.C. and R.A. Lechleitner. 2002. Stoneflies (Plecoptera) of Mount Rainier National Park, Washington. Western North American Naturalist, 62: 385-404.
  9. Kondratieff, B.C. and R.W. Baumann (coordinators). 2000. Stoneflies of the United States. Jamestown, North Dakota: Northern Prairie Wildlife Research Center Home Page. Online: http://www.npwrc.usgs.gov/resource/distr/insects/sfly/index.htm (Version 12 December 2003).
  10. Newell, R.L., R.W. Baumann, and J.A. Stanford. 2006. Pages 173-186 in F.R. Hauer, J.A. Stanford, and R.L. Newell. 2006. International Advances in the Ecology, Zoogeography, and Systematics of Mayflies and Stoneflies. University of California Press, Ecology series, Volume 128. 311 pp.
  11. Ricker, W.E. 1952. Sytematic Studies in Plecoptera. Indiana University Publications, Science Series 18. Indiana University Press: Bloomington, Indiana. 200 pp.
  12. Stark, B.P. 1996. North American Stonefly List. No longer available online.
  13. Stark, B. P., K. W. Stewart, S. W. Szczytko, R. W. Baumann, and B. C. Kondratieff. 2012. Scientific and common names of Nearctic stoneflies (Plecoptera), with corrections and additions to the list. The Caddis Press, Miscellaneous Contribution No. 1. 20 pp.
  14. Stewart, K.W. and M.W. Oswood. 2006. The Stoneflies (Plecoptera) of Alaska and Western Canada. The Caddis Press: Columbus, Ohio. 325 pp.
  15. U.S. Fish and Wildlife Service (USFWS). 2011. Endangered and threatened wildlife and plants; 12-month finding on a petition to list the Bearmouth mountainsnail, Byrne Resort mountainsnail, and meltwater lednian stonefly as endangered or threatened. Federal Register 76(65): 18684-18701.
  16. U.S. Fish and Wildlife Service (USFWS). 2019. Endangered and Threatened Wildlife and Plants; Threatened Species Status for Meltwater Lednian Stonefly and Western Glacier Stonefly With a Section 4(d) Rule. Federal Register 84(225):64210-64227.
  17. U.S. Fish and Wildlife Service (USFWS). 2019. Review of Domestic and Foreign Species That Are Candidates for Listing as Endangered or Threatened; Annual Notification of Findings on Resubmitted Petitions; Annual Description of Progress on Listing Actions. Federal Register 84(197):54732-54757.
  18. U.S. Fish and Wildlife Service (USFWS). 2020. Endangered and Threatened Wildlife and Plants; Review of Domestic Species That Are Candidates for Listing as Endangered or Threatened; Annual Notification of Findings on Resubmitted Petitions; Annual Description of Progress on Listing Actions. Federal Register 85(221):73164-73179.