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Photo#1073205
Deschutes Mayfly

Deschutes Mayfly
Deschutes State Recreation Area, Sherman County, Oregon, USA
May 24, 2015
Near the river on blackberry.

unknown
Good point Roger

Maccafertium
I started a new book on the Maccaffertium vicarium complex. The wings look odd but the pronotum and tergite markings seem to match
(Maccaffertium vicarium / rivulicolum).


Mack.

 
Not Maccaffertium
Mack-

The only Heptageniid of genus Maccaffertium known from Oregon is M. terminatum terminatum, which would not even remotely resemble John's photo. As for Maccaffertiun vicarium, please see it's distribution here.

Moved
Moved from Mayflies.

Heptageniid
Hi John-

Nice photo. I believe this female subimago to be of family Heptageniidae, and suspect it may be of genus Cinygmula, but for now, will place it at family level in the guide.

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