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Stenonema fematorium?

Stenonema fematorium?
Nespelem, Okanagan County, Washington, USA
August 4, 2011
Size: 9 mm excl caud. filament
Thanks for looking at this for me Brady. I have to admit I was doing some guessing as I went throught the key (Merritt et al.), since the 7th pair of gills are missing.
I noticed in the key that in Ecdyonurus, the pale spots between the antennae are missing, and abdominal terga are usually without a distinct contrasting color pattern.
I wonder if it might be Nixe?

Images of this individual: tag all
Stenonema fematorium? Stenonema fematorium? Stenonema fematorium?