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Trichoptera: Rhyacophilidae of Gunnison County, Colorado

Rhyacophila pellisa

Ross 1938
Updated 29 Feb 2016
TSN 115114
On this website:
Introduction to Rhyacophila

Other Websites:
Photos, Map, Museum specimens, DNA - Barcodinglife.org

University of Alberta Entomology Collection Species page
     Has illustration of male genitalia, description, habitat information, range and more.


DeWalt,RE; Stewart,KW; Moulton,SR; Kennedy,JH 1994 Summer emergence of mayflies, stoneflies, and caddisflies from a Colorado mountain stream. Southwestern Naturalist 39 3, 249-256.
     Abstract: " The summer emergence patterns of mayfly, stonefly, and caddisfly species are described for a second order, southern Rocky Mountain Colorado stream. Frequent, standardized, sweepnetting and emergence trap samples provided 1,779 adults of 45 taxa consisting of 11 mayfly, 15 stonefly, and 19 caddisfly species. The five most dominant species were, in order of importance, Suwallia nr. lineosa, Sweltsa coloradensis, Oligophlebodes minutus, Paraleuctra vershina, and Baetis bicaudatus. Stoneflies contributed 70% of all adults collected. Peak species richness of all orders occurred near the summer solstice and maximum water temperatures. The range of slope values generated by simple linear regression of cumulative percentage catch revealed that emergence was extended (slopes < 4%/day) for five of the seven most abundant species. Two caddisflies, O. minutus and Rhyacophila pellisa, displayed a synchronous emergence pattern. This study adds 35 new records for the Rio Conejos drainage and Conejos County and provides a baseline of comparison against future changes in species richness among these orders."

Herrmann,SJ; Ruiter,DE and Unzicker,JD 1986 Distribution and records of Colorado Trichoptera. Southwestern Naturalist 31 4, 421-457.
     They note the habitat for this species is streams and rivers, the altitudinal range is 2286 to 3194m and adult collection dates are 8 May to 24 August. They list this species as present in Gunnison county.

Ross, HH 1938 Descriptions of Nearctic Caddisflies. Bulletin of the Illinois Natural History Survey 21:101-183.
     First description of this species from Rocky Mountain National Park.

Ruse,LP and Herrmann,SJ 2000 Plecoptera and Trichoptera species distribution related to environmental characteristics of the metal-polluted Arkansas River, Colorado. Western North American Naturalist 60 (1) 57-65. PDF
     They looked at adult stonefies and caddisfies upstream and downstream of inputs from trans mountain diversions, heavy metal pollution and dams on the Arkansas River in 1983 and 1984. Quote from page 61: "...the caddisfly Rhyacophila pellisa and the stonefly Podmosta delicatula, were associated with sites on the East Fork and the most upstream Arkansas River sites. Rhyacophila pellisa reappeared below the most metal-polluted sites at AR11." Quote from page 63: "The negative effect of heavy metal inputs from Leadville Drain and California Gulch on stonefly or caddisfly species richness was less than that of Pueblo Reservoir."

Schmid,F 1970 Le genre Rhyacophila et la famille des Rhyacophilidae (Trichoptera). Memoires de la Societe Entomologique du Canada 66:1-230.

Brown,WS 2005 Trichoptera (Caddisflies) of Gunnison County, Colorado