Stoneflies - Plecoptera: Perlodidae of Gunnison County, ColoradoDiura knowltoni
Nearctic Springfly (Frison) 1937
Updated 4 Mar 2011
TSN 103096
Notes
Older publications may refer to this species as Dictyopterygella knowltoni.
Good Links
On this website:
Key to Perlodidae Nymphs
Other Websites:
References
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 125: "The genus Diura is composed of medium-sized, light brown stoneflies with short, conical submental gills. The mesosternal ridge pattern of both adults and nymphs lacks the transverse ridge and arms of the Y-ridge join the posterior corners of the furcal pits. Males are unique within the subfamily because they lack an epiproct (fig. 396). The tenth tergum of the male bears a membranous median triangle on the posterior edge and a few spinules on the dorsal surface. The subgenital plate of the female is briefly produced and truncate or slightly excavated(fig 397.) Only one species of Diura is recorded from the Rocky Mountains. The nymph is brightly colored with brown and yellow transverse stripes on the abdomen."
Quote from page 125: "This species is found in creeks and rivers but is seldom common. The adults emerge from April to June."
Frison,TH 1937 II. Descriptions of Plecoptera with special reference to the Illinois species. Illinois Natural History Survey Bulletin 21 3, 78-99.
Original description as Dictyopterygella knowltoni.
Knight,AW; Gaufin,AR 1966 Altitudinal distribution of stoneflies (Plecoptera) in a Rocky Mountain drainage system. Journal of the Kansas Entomological Society 39 4, 668-675. First page
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 397: "This species is uncommonly collected as adults, but good nymphal populations can be found in small to large-sized streams of the Mountain region, especially in the upper Colorado River basin."
Stewart,KW and Stark,BP 2002 Nymphs of North American Stonefly Genera. 2nd edition The Caddis Press, Columbus, Ohio. 510 pages.
Photo of nymph habitus on page 107 figure 6.24. Illustrations of nymph on page 391-392, figures 14.19-14.20
Ward,JV, Kondratieff,BC and Zuellig,RE 2002 An Illustrated Guide to the Mountain Stream Insects of Colorado. 2nd ed. University Press of Colorado, Boulder, Colorado. 219 pages.
Illustration of Diura knowltoni nymph on page 75, figure 35.
Mesosternal Y-arms
Only visible easily on mature nymphs. |
Lacinia
Notice the little knob below the short tooth. |
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