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Stoneflies - Plecoptera: Capniidae of Gunnison County, Colorado

Introduction to Utacapnia - Tiny Winter Blacks, Snowflies

Gaufin, 1970
Updated 6 Jan 2012
TSN 102752

Provisional Species List

Utacapnia logana
Utacapnia poda

Good Links

Capniidae Introduction


Baumann,RW, Gaufin,AR and Surdick,RF 1977 The stoneflies (Plecoptera) of the Rocky Mountains. Memoirs of the American Entomological Society 31, 1-208.
     Quote from page 86: "Utacapnia is primarily a western North American genus with one species occurring in Labrador. The wing length exhibited varies from apterous to macropterous (figs. 302, 303). Usually only the males show reduction in wing length but the females of a few species show similar modifications.
The males are charaterized by an epiproct that is composed of two parallel processes which are lined up one under the other (figs. 251, 252). The femles all have a large subgenital plate that extends over the anterior margin of sternum nine (fig. 265). The bulk of the plate is usually light in color with a distinctive median sclerotized pattern. The nymphs are large and elongate as in figure 162. "

Bergey,EA and Ward,JV 1989 Upstream-downstream movements of aquatic invertebrates in a Rocky Mountain stream, Hydrobiologia, Volume 185( 1) 71-82. Abstract

DeWalt,RE and Stewart,KW 1995 Life histories of stoneflies (Plecoptera) in the Rio Conejos of southern Colorado. Great Basin Naturalist 55, 1-18. PDF

Gaufin,AR 1970 Type species designation for the subgenus Utacapnia (Plecoptera: Capniidae). Entomological News 81:197.
     Describes the genus Utacapnia.

Nebeker,AV and Gaufin,AR 1965 The Capnia columbiana complex of North America (Capniidae: Plecoptera). Transactions of the American Entomological Society 91:467-487.
     Describes several local species as Capnia, some of which have since been moved to a new genus such as U. logana and U.poda.

Stewart,KW and Ricker,WE 1997 The stoneflies of the Yukon. pgs 201-222 in Danks,HV and Downes,JA (Eds.), Insects of the Yukon. Biological Survey of Canada (Terrestrial Arthropods), Ottawa. 1034 pp.
     Quote from page 208 and 209: "Nearctic; the 11 species, except U. labradora (Ricker), are distributed in the west, from Alaska and Yukon south to California and New Mexico. Adults black, 7-11 mm. Emergence February-April in southern range to June-July at high elevation in Alaska and Yukon. There have been no published accounts of biology of any species in this genus."

Brown, Wendy S. 2004 Plecoptera or Stoneflies of Gunnison County, Colorado