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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Mayflies (Ephemeroptera) » Pisciforma » Heptagenioidea » Brushlegged Mayflies (Isonychiidae) » Isonychia
Photo#1450102
Big Mayfly - Isonychia
Copyright © 2017 Red Admiral

Big Mayfly - Isonychia
Carlotta/Van Duzen River, Humboldt County, County, California, USA
October 1, 2017
Size: 28 mm not counting tails
There were a great many exuvia on the river bank and stones. These are the largest mayflies I've ever seen.

Images of this individual: tag all
Big Mayfly - Isonychia Big Mayfly - Isonychia
Contributed by Red Admiral on 3 October, 2017 - 8:03pm
Last updated 7 October, 2017 - 7:46am

Moved
Moved from Mayflies.
… Roger Rohrbeck, 7 October, 2017 - 7:46am

Isonychia
Red Admiral-

I believe this female subimago (as well as the accompanying image of exuvia) to be of genus Isonychia.
… Roger Rohrbeck, 7 October, 2017 - 7:44am

Moved
Moved from ID Request.
… Ken Wolgemuth, 3 October, 2017 - 8:10pm

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