Stoneflies - Plecoptera: Capniidae of Gunnison County, Colorado
Capnia nana Claassen 1924
Dwarf Snowfly, Winter Stonefly
Updated 3 Dec 2017
On this website:
Photos, Map, Museum specimens, DNA - Barcodinglife.org
Photos - troutnut.com
Claassen,PW 1924 New species of North American Capniidae (Plecoptera). Canadian Entomologist (56) 43-48, 54-57. Male Type specimen and another Female Type specimen
Kondratieff,BC and Baumann,RW 2002 A review of the stoneflies of Colorado with description of a new species of Capnia (Plecoptera: Capniidae). Transactions of American Entomological Society 128 (3) 385-401.
Quote from page 388: " This species appears to be restricted to the southwestern portion of the state, having been only infrequently collected from small to medium streams in Archuleta Co. and Conejos Co."
Marden,JH and Kramer,MG 1994 Surface-skimming Stoneflies: A possible intermediate stage in insect flight evolution. Science, 266(5184) 427-430. PDF
Discusses Capnia nana among other stoneflies.
Abstract: " Insect wings appear to have evolved from gills used by aquatic forms for ventilation and swimming, yet the nature of intermediate stages remains a mystery. Here a form of nonflying aerodynamic locomotion used by aquatic insects is described, called surface skimming, in which thrust is provided by wing flapping while continuous contact with the water removes the need for total aerodynamic weight support. Stoneflies surface skim with wing areas and muscle power output severely reduced, which indicates that surface skimming could have been an effective form of locomotion for ancestral aquatic insects with small protowings and low muscle power output. "
Mutch,RA and Pritchard,G 1986 Development rates of eggs of some Canadian stoneflies (Plecoptera) in relation to temperature. Journal of the North American Benthological Society, 272-277.
Nebeker,AV 1971 Effect of temperature at different altitudes on the emergence of aquatic insects from a single stream. Journal of the Kansas Entomological Society 26-35. PDF
Nebeker,AV and Gaufin,AR 1967 Factors affecting wing length and emergence in the winter stonefly Capnia nana. Entomological News 78 85-92.
Nebeker,AV and Gaufin,AR 1967 Geographic and seasonal distribution of the family Capniidae of western North America (Plecoptera). Journal of the Kansas Entomological Society, 415-421.
Needham,JG and Claassen,PW 1925 A Monograph of the Plecoptera of North America. Entomological Society of America, Lafayette, Indiana. 397 pages.
Described as Capnia nana.
Nelson,RC and Baumann,RW 1989 Systematics and distribution of the winter stonefly genus Capnia (Plecoptera: Capniidae) in North America. Great Basin Naturalist 49, 289-363. PDF
Brown,WS 2004 Plecoptera or Stoneflies of Gunnison County, Colorado
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