Anybody know the genus and species?

The Specimen

View 11 PicturesThis large Perlodidae stonefly was a strikingly bright yellow color, moreso than any other insect I've seen. I didn't enhance it much. I tried identifying its genus and came up with Arcynopteryx, which lives a couple thousand miles from where I collected this one, so I'm stuck.

Region: Catskills

Collected Apr 19, 2006

Added Apr 22, 2006

The Discussion

Post Reply

Troutnut	July 7th, 2006, 10:46 am
Fairbanks, AK Posts: 1113	This stonefly comes from a fertile, cold small stream in the Catskills. I tried to ID it using the key to genera in Merritt & Cummins but I ended up with a fairly confident identification that can't be correct: Arcynopteryx, a western mountain genus. So I'm stuck at couplet 89 in the M&C key.
	Jason Neuswanger The Troutnut
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Taxon	July 10th, 2006, 10:16 pm
Mercer Island, WA Posts: 478	Jason- Guess I posted this response in the wrong place, as it didn't show up here. I realize you've already acknowledged the information somewhere else, but I'm re-posting it here for others to see. Not to despair; this is what American Stoneflies: A Photographic Guide to the Plecoptera by Bill P. Stark, Stanley W. Szezytko, and C. Ridley Nelson has to say about genus Arcynopteryx: "This genus is represented in North America by A. compacta (McLachlan). This species ranges from Alaska to Maine and has been reported as far south as Colorado. Males usually have shortened wings and are easily recognized by the long, lash-like epiproct tip. Females and nymphs are quite similar to Skwala. A. compacta has been collected around alpine lakes in the northern Rocky Mountains. No photographs are available for this group." Also, Arcynopteryx compacta is listed by Stark/Baumann as residing in New York.
	Roger Rohrbeck www.FlyfishingEntomology.com