Species: Rhyacophila angelita Banks 1911

Smith (1984) reports this species as being found exclusively in very fast flowing streams with "course substrate"(gravel and cobble?). It is univoltine in Saskatchewan

References:

Smith, D. H. 1984. Systematics of Saskatchewan Trichoptera larvae with emphasis on species from the boreal streams. Ph.D. Thesis U. of Saskatchewan, Saskatoon. SK 1302 pp.