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Photo#337626
Mayfly in September - Cloeon dipterum - female

Mayfly in September - Cloeon dipterum - Female
Brighton, Monroe County, New York, USA
September 21, 2009
I haven't figured out what family it's in.

Moved
Moved from Mayflies.

female imago Cloeon [?dipterum]
best guess; baetid, in any case

 
Yes...
Baetidae: Cloeon dipterum female imago. At least, that is the way current North American taxonomy would have it. I'm not sure where the debate in European taxonomy stands. Sowa (1975) made the argument for three species--dipterum, cognatum, and inscriptum. It is interesting to note that many of the morphological distinctions used by Sowa to separate adults of the European species are also represented by BugGuide specimens.

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