Allocapnia
C. Riley NelsonThis tree diagram shows the relationships between several groups of organisms.
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close boxIntroduction
The genus Allocapnia is restricted to eastern North America, extending from the Great Plains to the Atlantic Coast. Many are wingless, especially the males. The benchmark revision by Ross and Ricker (1971) contains a vast amount of information regarding this interesting genus.
Characteristics
Synapomorphies for Allocapnia: epiproct snap-like (Ross & Ricker 1971), shared with Capnia vidua from Europe. Allocapnia differs from C. vidua in having a dorsal process on the eighth ternite of the male and in the pattern of sclerotization of the male ninth segment.
References
Hennig, W. 1966. Phylogenetic systematics. Univ. Illinois Press, Urbana. 263 pp.
Ross, H. H. & W. E. Ricker. 1971. The classification, evolution, and dispersal of the winter stonefly genus Allocapnia. Illinois Biological Monographs 45: 1-166.
Zwick, P. 1973. Insecta: Plecoptera. Phylogenetisches System und Katalog. Das Tierreich 94. Walter de Gruyter and Co., Berlin. 465 pp.
About This Page
C. Riley Nelson
Brigham Young University, Provo, Utah, USA
Page copyright © 1996
All Rights Reserved.
Citing this page:
Nelson, C. Riley. 1996. Allocapnia. Version 01 January 1996 (under construction). http://tolweb.org/Allocapnia/14102/1996.01.01 in The Tree of Life Web Project, http://tolweb.org/