Rhyacophila colonus Schmid, 1970
O'Brien rhyacophilan caddisfly
Taxonomy & Nomenclature
Conservation Status
Globally Rediscovered
Last record: 5 June 1965
Rediscovered in: 1993
Previously considered GH - Possibly Extinct by NatureServe (Oregon Natural Heritage Program, 2001; Francisco "Frank" Godino, in litt.).
Distribution & Habitat
California & Oregon, USA
Biology & Ecology
Hypodigm
Media
References
Original scientific description:
Schmid, F. (1970). Le genre Rhyacophila et la famille Rhyacophilidae (Trichoptera). Memoirs of the Society of Entomology of Canada. 66:1-230.
Other references:
Borgias, D. and Wisseman R. W. (1999). Report on the 1998 and 1999 survey for Rhyacophila colonus, in forested torrents near O'Brien, Oregon. The Nature Conservancy of Oregon. Prepared for Diane Perez, Siskiyou National Forest.
Morse, John C. (1993). A checklist of the Trichoptera of North America, including Greenland and Mexico. Transactions of the American Entomological Society 119(1): 47-93. https://www.jstor.org/stable/25058246
NatureServe. (2026). Rhyacophila colonus: Obrien Rhyacophilan Caddisfly. NatureServe Network Biodiversity Location Data accessed through NatureServe Explorer [web application]. NatureServe, Arlington, Virginia. Available at: https://explorer.natureserve.org/ [Accessed on 1 November 2026]
Oregon Natural Heritage Program. (2001). Rare, Threatened and Endangered Plants and Animals of Oregon. Oregon Natural Heritage Program, Portland, Oregon. 94 pp. (98 pp. PDF).