Plecoptera: Capniidae of Gunnison County, Colorado
Eucapnopsis brevicauda (Claassen) 1924
Shorttailed Snowfly
Updated 2 Dec 2005
Links
On this website:
Capniidae Introduction
Other Websites:
Map - Kondratieff, Boris C. and Richard W. Baumann (coordinators). 2000. Stoneflies of the United States. Jamestown, ND: Northern Prairie Wildlife Research Center Online. (Version 12DEC2003).
http://www.npwrc.usgs.gov/resource/distr/insects/sfly/usa/99.htm
References
Baumann,RW; Gaufin,AR; Surdick,RF 1977 The stoneflies (Plecoptera) of the Rocky Mountains. Memoirs of the American Entomological Society 31, 1-208.
Quote from page 77: "This species is abundant in both creeks and rivers throughout its range. The adults emerge from February to July."
Claassen,PW 1924 New species of North American Capniidae (Plecoptera). Canadian Entomologist 56, 43-48, 54-57.
Duffield,RM; Nelson,CH 1998 Stoneflies (Plecoptera) in the diet of brook trout (Salvelinus fontinalis Mitchell) in Libby Creek, Wyoming, USA. Hydrobiologia 380, 59-65.
Quote from page 61, 63: "Eucapnopsis brevicauda absent from May samples, appeared in June, July, and August samples. At 6.3% of the total stonefly dietary component, this species was the third most abundant species recovered. In June samples, most specimens were larvae, wheras in July and August the specimens were adults. " The authors also note that most of the adults found in trout stomachs were females. This may be because they are vulnerable to predation by fish when they return to the water to lay their eggs.
Frison,TH 1937 II. Descriptions of Plecoptera with special reference to the Illinois species. Illinois Natural History Survey Bulletin 21 3, 78-99.
Illustrations of Male front wing and genitalia and female abdominal sternites (Figure 73 on page 86).
Kondratieff,BC; 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 390: "This small brown to black stonefly emerges in late winter and early spring and can be locally abundant in many streams of the Mountain and Plateau region."
Stewart,KW; 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 207: "Japan and Western Neararctic; the single Nearactic species E. brevicauda, occurs in the west from Alaska and Yukon south to Caligfornia and New Mexico. The small black adults emerge February-July in the ROcky Mountains and Yukon, depending on elevation and latitude. Nymphs yellowish brown, 4-6mm, in stream substrates. Univoltine, fast life cycle; small nymmphs in diapause about 7 months from spring through summer, growing actively from autumn to emergence. "
Stewart,KW; Stark,BP 2002: Nymphs of North American Stonefly Genera. 2nd edition The Caddis Press, Columbus, Ohio. 510 pages. Illustrations of nymph on pages 130-131, figures 7.9-7.10
Ward,JV; Kondratieff,BC; Zuellig,RE 2002 An Illustrated Guide to the Mountain Stream Insects of Colorado. 2nd ed. University Press of Colorado, Boulder, Colorado. 219 pages. Buy from Amazon.com
Illustration of E. brevicauda nymph on page 69, figure 29.
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