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Photo#53322
Mayfly - Maccaffertium

Mayfly - Maccaffertium
Harvard, Worcester County, Massachusetts, USA
May 21, 2006
Size: 10mm
When I swept the net through the grass and water at the edge of the Nashua River, I got this adult mayfly and a Baetisca skin.

Maccaffertium sp., maybe
I think a Maccaffertium, but I am not sure. Sort of close to Maccaffertium vicarium, but not close enough. The Baetisca adults in the collection just don't look like this.

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