A Mayfly - Siphlonurus autumnalis
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This valid species has been known historically only from western Canada (McDunnough, 1931), Washington and Montana (Jacobus and McCafferty, 2002) . It occurs in western Montana in Crazy Beaver Spring and Cut Bank Spring and Wally Spring, Flathead County; Fisher Cap Lake, Swiftcurrent Lake, Waterton Lake, and Josephine Lake in Glacier National Park, Glacier County (McCafferty and Newell, 2007).
Observations in Montana Natural Heritage Program Database
Number of Observations:
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Map Help and Descriptions
(Observations spanning multiple months or years are excluded from time charts)
This species has been taken from rocky but somewhat quiet edgewaters along relatively large rivers in the Northwest (Jacobus and McCafferty, 2002)
Threats or Limiting Factors
All forms of stream quality degradation pose potential threats. These include siltation; pollution from agricultural and industrial waste; and hydrological alteration from drainage, dams, or withdrawal of excess water for human use.
- Literature Cited AboveLegend: View Online Publication
- Jacobus, L.M. and W.P. McCafferty. 2002. Provancher's quebecensis mayfly species (Ephemeroptera: Leptophlebiidae, Siphlonuridae). Entomological News, 113(5): 315-317.
- McCafferty, W.P. and R.L. Newell. 2007. Insecta, Ephemeroptera: Range extensions and new state records from far western Montana, U.S.A. Check List 3:260-266.
- McDunnough, J. 1931. New species of North American Ephemeroptera. Can Entomol. 63: 82-93.
- Additional Sources of Information Related to "Insects"