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TaxonomyBrowse
Info
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Genus Allocapnia

Snowfly - Allocapnia Allocapnia? - Allocapnia maria - male Small Winter Stonefly - Allocapnia pygmaea - male Small Winter Stonefly - Allocapnia minima - male Stonefly - Allocapnia recta - male Stonefly coming out in creek at home - Allocapnia maria small winter stonefly - Allocapnia Allocapnia pygmaea - male - female
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Plecoptera (Stoneflies)
Superfamily Nemouroidea
Family Capniidae (Small Winter Stoneflies)
Genus Allocapnia
Explanation of Names
Allocapnia Claassen 1928
Numbers
47 spp. total, all in our area (42 in contiguous US)(1)(2)(3)
Identification
Adult: wings, when present, have reduced venation and may extend beyond tip of abdomen or be shorter than abdomen; forewing has few cross veins, and cells are elongate, of different sizes, and not arranged in rows (all characteristics of family Capniidae); in Allocapnia, anal lobe of hindwing is nearly as long as rest of wing; many adults are wingless, especially the males, which have a dorsal process on the eighth tergite and a rod-like appendage (epiproct) that recurves over the top of the ninth abdominal segment (as shown in here)
nymphs of some species can be identified by examining the pattern of hairs (setae) on various body parts under a microscope
Range
e. NA to sw. US
See Also
Capnia species have a western distribution and the anal areas of the wings reach not more than half the length of the wings
Print References
Ross H.H., Freytag P.H. (1967) Remarkable sympatry in the winter stoneflies Allocapnia indianae and A. ohioensis, a pair of sister species. Ohio J. Sci. 67: 228-232 (Full text)
Stark P.B., Lacey J.W. (2005) Larvae of the winter stonefly genus Allocapnia (Plecoptera: Capniidae) in Mississippi, USA. Illiesia 1: 10-20 (Full text)