A Mayfly - Caudatella jacobi
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Known from British Columbia, Oregon, and Montana. The global ranking of this species may well increase as new collections from western states, including Montana, Oregon and Washington, are studied. Recently reported from a site in Juneau County, Alaska (Randolph and McCafferty, 2005).
Observations in Montana Natural Heritage Program Database
Number of Observations:
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(Observations spanning multiple months or years are excluded from time charts)
Habitat appears similar to the better known Caudatella hystrix, including riffle habitats in small to medium sized streams and often in association with algal growths and cobbles (McCafferty 2003).
Caudatella larvae are scrapers and collectors-gatherers feeding on detritus, algae and diatoms) (Cummins and Merritt 1996).
Threats or Limiting Factors
All forms of stream quality degradation pose potential threats to cold-water mayflies. These include siltation; pollution from agricultural and industrial waste; and hydrological alteration from diversions, dams, or withdrawal of excess water for human use.
- Literature Cited AboveLegend: View Online Publication
- Cummins, K.W. and R.W. Merritt. 1996. Ecology and distribution of aquatic insects. Chapter 6, pages 74-86 in R.W. Merritt and K.W. Cummins (eds.) An Introduction to the Aquatic Insects of North America. Third Edition. Kendall/Hunt Publishing Company, Dubuque, Iowa. 862 pp.
- McCafferty, P. Department of Entomology, Purdue University, West Lafayette, Indiana 47907.
- Randolph, R.P. and W.P. McCafferty. 2005. The mayflies (Ephemeroptera) of Alaska, including a new species of Heptageniidae. Proceedings of the Entomological Society of Washington 107(1): 190-199.
- Additional Sources of Information Related to "Insects"