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Home » Guide » Arthropods (Arthropoda) » Insects (Insecta) » Stoneflies (Plecoptera) » Winter Stoneflies (Taeniopterygidae) » Taeniopteryx » Taeniopteryx nivalis
Photo#250610
Winter Stonefly Nymph - Taeniopteryx nivalis
Copyright © 2009 Stephen Luk

Winter Stonefly Nymph - Taeniopteryx nivalis
Eramosa River, Guelph, Wellington, Ontario, Canada
January 13, 2009
Size: 8.2 mm
In detritus. Size measurement excludes cerci.
Contributed by Stephen Luk on 26 January, 2009 - 3:57pm
Last updated 19 February, 2009 - 10:09pm

Moved
Moved from Taeniopteryx.
… Stephen Luk, 19 February, 2009 - 10:09pm

Moved
I'm reasonably certain it is nivalis. I'd ask Dr. Stephen Marshall to be sure, he said the major rivers in Guelph support a mass Taeniopterygid emergence in March.
… Stephen Luk, 26 January, 2009 - 10:40pm

Taeniopteryx
This genus has fingerlike coxal gills. If you look behind the lower middle leg, I believe you can see one of these. If I had to guess about the species, I would lean toward T. nivalis (aka the Boreal Willowfly). Although they usually have a pale dorsal stripe, the pale lateral borders of the pronotum and the yellowish femur tips are also traits of this common species.
… Lloyd Gonzales, 26 January, 2009 - 9:51pm

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