Genus Allocapnia

Classification · Explanation of Names · Numbers · Identification · Range · See Also · Print References · Works Cited

Small Winter Stonefly - Allocapnia minima - male

Small Winter Stonefly - Allocapnia - male

Small Winter Stoneflies mating: Close-up of male's abdomen (suggested ID: A. aurora) - Allocapnia - 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)

Works Cited

1.	Stark B.P., Baumann R.W., DeWalt R.E. (2009) Valid stonefly names for North America

2.	Kondratieff B.C., Baumann R.W. (2000-2014) Stoneflies of the United States

3.	DeWalt R.E., Maehr M.D., Neu-Becker U., Stueber G. (2013) Plecoptera species file online. Version 5.0

Contributed by Eric R. Eaton on 20 December, 2005 - 5:01pm
Additional contributions by Robin McLeod, v belov
Last updated 20 December, 2014 - 12:31pm

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