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Stoneflies - Plecoptera: Chloroperlidae of Gunnison County, Colorado
Alloperla pilosa - Hairy Sallfly

Needham and Claassen 1925
Updated 2 June 2010
TSN 103229


Adults are bright green, this is the only Alloperla with an abdominal stripe.


>3040 meters elevation snowmelt streams

Life History

Adults emerge in June and July


Endemic to Colorado

Good Links

On this website:
Key to Alloperla females
Key to Alloperla males
Comparison of the two local species of Alloperla
Alloperla severa

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/284.htm

Alloperla sp. Adult Photo from the Tree of Life

Alloperla from Natureserve.org


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: " Discussion.- This species has been collected only in the Colorado Rockies. It occurs in small creeks at high elevations. The adults emerge in June and July." Figure 506 male terminalia dorsal view and Figure 507 male terminalia lateral view on page 177.

Finn,DS and Poff,NL 2008 Emergence and flight activity of alpine stream insects in two years with contrasting winter snowpack. Artic, Antarctic, and Alpine Research 40(4)638-646. PDF

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.
     "This unusual Alloperla is only known from small subalpine and alpine (>3,040 m elevation) streams of Colorado (Lyon and Stark 1997). These streams are fed primarily by snowmelt."

Lyon,ML; Stark,BP 1997 Alloperla (Plecoptera: Chloroperlidae) of western North America. Entomological News 108 5, 321-334.

Needham,JG and Claassen,PW 1925 A Monograph of the Plecoptera of North America. Entomological Society of America, Lafayette, Indiana. 397 pages.
     Described on page 124.

Nelson,CH and Hanson,JF 1968 Two New Species of Alloperla (Plecoptera: Chloroperlidae) from China. Journal of the Kansas Entomological Society (41)4 425-428. Abstract and First Page


subgenital plate
Brown, Wendy S. 2004 Stoneflies of Gunnison County, Colorado