Updated 25 July 2017
Locations CollectedAllan (1975) reports this species from Cement Creek.
Good LinksOn this website:
Introduction to Rhyacophila
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.
ReferencesAllan, J.D. 1975 The distributional ecology and diversity of benthic insects in Cement Creek, Colorado. Ecology 56:1040-1053. PDF
Banks,N 1911 Descriptions of new species of North American Neuropterid Insects. Transactions of American Entomological Society 37, 335-360.
Describes R angelita on page 352 and Figure 29.
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 1975 to 3036m and adult collection dates are 19 July to 19 October. Quote from page 450: "Smith (1968b) found this species to occur in cold, clear streams in Idaho; this species is found under similar conditions in Colorado. "
Peckarsky,BL 1980 Influence of detritus on colonization of stream invertebrates. Canadian Journal of Fisheries and Aquatic Sciences 37, 957-963.
Prather,AL; Morse,JC 2001 Eastern Nearctic Rhyacophila species, with revision of the Rhyacophila invaria group (Trichoptera: Rhyacophilidae). Transactions of American Entomological Society 127 1, 85-166.
Short,RA and Ward,JV 1980 Macroinvertebrates of a Colorado high mountain stream. The Southwestern Naturalist, 23-32. PDF
Smith,SD 1968 The Rhyacophila of the Salmon river drainage of Idaho with special reference to larvae. Annals of the Entomological Society of America 61 3, 655-674.
Has a key to larvae that includes R. angelita. " Description: Head yellow, with a variable color pattern. Transverse dark brown band present across the gena of most specimens; in some, band broken or absent; in others darkened muscle scars may be present also (Figure 29). Pronotum yellow anteriorly and brown posteriorly, but some specimens without a distinctly darker posterior area. Abdomen without gills and fleshy protuberances. Anal proleg with a baso-ventral hook andan apico-lateral spur, and anal claw with a single ventral tooth (Figure 31). Length of mature larvae approximately 16 mm.
Wold,JL 1973 Systematics of the genus Rhyacophila (Trichoptera: Rhyacophilidae) in western North America with special reference to the immature stages (Doctoral dissertation). PDF
Quote from page 72: " Biology: Mature pupae occurred in Idaho (Smith, 1968) from late May through early August. Pupation occurred in July, August and September. Smith (1968) thought this species overwintered as small- to medium-sized larvae, but may have also overwintered as eggs in some other sections of Idaho. Smith (1968) collected adults in the Salmon River drainage in July, but found them to be more numerous during September and October. In other sections of Idaho he found emergence to be concentrated in late June and early July.
Nimmo (1971) found the majority of the adults in flight in Alberta from early July to mid-October. Pupae have been collected during late May, July and late August in Oregon. Adults were collected in Oregon during late June, July, and late in September."
Brown, WS 2004 Trichoptera of Gunnison County, Colorado, USA