Mayfly - Eurylophella prudentalis

Moved

… tom murray, 22 November, 2008 - 11:17pm

Thanks Lloyd

I wonder if this is an E. prudentalis.

… tom murray, 22 November, 2008 - 11:45am

Could be...

I can't see anything that would rule out prudentalis, but a close examination of the genitalia of a male imago would be conclusive. This seems like a good match for your female subimago placed in that species. We had previously guessed that these might be making their way to your house from the Nashua. All of the Eurylophella nymphs that you collected from there were identified by DSC as prudentalis. Some guesswork, to be sure, but it seems reasonable to me.

… Lloyd Gonzales, 22 November, 2008 - 3:56pm

Missing a "tail"

Looks like a male Eurylophella subimago. Orange eyes, brown body, yellowish legs, dark wings, and banded tails are pretty typical of most Eurylophella "duns," but the long 9th abdominal segment is probably the easiest way to separate these from other Ephemerellidae.

… Lloyd Gonzales, 22 November, 2008 - 7:55am