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The Specimen

Heptageniidae (March Browns, Cahills, Quill Gordons) Mayfly DunHeptageniidae (March Browns, Cahills, Quill Gordons) Mayfly Dun View 10 PicturesThis specimen is really strange, very different in form from any other mayfly I've seen. Unfortunately it was found alone crippled in an eddy and in pretty bad shape, and I couldn't find any others like it.
Collected June 28, 2005 from the Long Lake Branch of the White River in Wisconsin
Added to by on May 26, 2006

The Discussion

TroutnutJune 25th, 2006, 8:12 pm
Bellevue, WA

Posts: 2737
I don't recognize this fly at all, and the major features are too damaged for me to follow my key to families. I'm guessing maybe it's some large and obscure species of Heptageniid, but it could be from some rare family of mayflies too.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist

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