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Plecoptera of Gunnison County, Colorado
Capniidae Nymph key to Genera

Updated 6 Dec 2009

1a. Cerci (tails) with a dense fringe of long lateral setae.
1b. Cerci without dense fringe of long setae.
2a. Lacinia with a single weakly sclerotized cusp; average number of cercal segments is 17.
2b. Lacinia with 2 sharp cusps; average number of cercal segments is 25.

Good Links

Intro Capniidae
Key to Male Capniidae
Key to Female Capniidae


Nelson,RC; Baumann,RW 1989 Systematics and distribution of the winter stonefly genus Capnia (Plecoptera: Capniidae) in North America. Great Basin Naturalist 49, 289-363. PDF

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