Agapetus denningi Ross, 1951
Denning’s agapetus caddisfly
Taxonomy & Nomenclature
Conservation Status
Missing (NatureServe, 2008, 2026; Oregon Biodiversity Information Center, 2019:33)
Last record: 1951 or earlier (Ross, 1951; NatureServe, 2026)
This species has not been recorded since at least 1951 despite several searches.
Distribution & Habitat
Oregon, USA
Type locality: Oregon, Jackson County, Rogue River National Forest
Biology & Ecology
Hypodigm
Only known from the type series collected no later than 1951. The exact year is uncertain as the scientific description of the species by Denning (1951) did not specify when the specimens were collected (Anderson, 1976).
Media
References
Original scientific description:
Ross, H. H. (1951). Phylogeny and biogeography of the caddisflies of the genera Agapetus and Electragapetus (Trichoptera; Rhyacophilidae). Journal of the Washington Academy of Science 41(11): 347-356.
Other references:
Anderson, N. H. (1976). The Distribution and Biology of the Oregon Trichoptera. Agricultural Experiment Station, Oregon State University Corvallis, Oregon, Technical Bulletin No. 134, 152 pp.
Mecom, J. O. (1972). Feeding habits of Trichoptera in a mountain stream. Oikos 23: 401-407.
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. (2008). “Agapetus denningi.” NatureServe Explorer: An online encyclopedia of life [web application]. Feb. 2008. Version 7.0. NatureServe, Arlington, Virginia. 10 May 2012 .
NatureServe. (2026). Agapetus denningi: Denning's Agapetus Caddisfly. NatureServe Network Biodiversity Location Data accessed through NatureServe Explorer [web application]. NatureServe, Arlington, Virginia. Available at: https://explorer.natureserve.org/ [Accessed on 4 October 2026]
Oregon Biodiversity Information Center. (2019). Rare, Threatened and Endangered Species of Oregon. Institute for Natural Resources, Portland State University, Portland, Oregon. 133 pp.
Oregon Biodiversity Information Center. (2025). Rare, Threatened and Endangered Zoology Species of Oregon. Institute for Natural Resources, Portland State University, Portland, Oregon. 44 pp.
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).
Wiggins, G. B. (1977). Larvae of the North American caddisfly genera (Trichoptera). Univ. Toronto Press, Toronto, Canada. 401 pp.
Wiggins, G. B. (1996). Larvae of the North American Caddisfly Genera (Trichoptera). Second Edition. Toronto and Buffalo: University of Toronto Press. 457 pp.
http://www.xerces.org/caddisfly-agapetus-denningi/