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> > Male spinner. Isonychia ?

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WystoneAugust 12th, 2007, 7:57 am
Posts: 1Identication help? Center Maine region ( NW of Bangor). Picture taken early July.
Screen openings 2mm
MartinlfAugust 12th, 2007, 8:11 am
Palmyra PA

Posts: 3213
I'll leave the ID to the professionals, but great photo and measurement idea.
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
TaxonAugust 12th, 2007, 12:06 pm
Site Editor
Royse City, TX

Posts: 1346
Male spinner. Isonychia ?

Yes, it would appear to be. There are (at least) three Isonychia species recorded from Maine, I. bicolor, I. georgiae, and I. obscura. Although the greatest statistical likelihood would be I. bicolor, reliable identification to species requires microscopic examination of male imago genitalia.

Luckily, we have a mayfly entomologist actively participating on this forum, who is qualified to make such an identification, if sent a preserved specimen. See this thread.
Best regards,
Roger Rohrbeck
JADAugust 12th, 2007, 5:49 pm
Alexandria Pa

Posts: 362

If I could taste it, I could tell you :) nice picture.


They fasten red (crimson red) wool around a hook, and fix onto the wool two feathers which grow under a cockís wattles, and which in colour are like wax.
Radcliffe's Fishing from the Earliest Times,

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