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Genus Allocapnia

Allocapnia? - Allocapnia maria - female Small Winter Stonefly - Allocapnia Small Winter Stonefly - Allocapnia minima - male Small Winter Stonefly - Allocapnia minima - female Small Winter Stonefly - Allocapnia minima - female Allocapnia vivipara - male - female Capniidae, genus Allocapnia - Allocapnia Stonefly - Allocapnia vivipara - female
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
47 spp. total, all in our area (42 in contiguous US)(1)(2)(3)
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
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)