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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Mayflies (Ephemeroptera) » Pisciforma » Heptagenioidea » Flatheaded Mayflies (Heptageniidae) » Ecdyonurus » Little Slate-Winged Dun (Ecdyonurus criddlei)
Photo#880112
Ecdyonurus criddlei - voucher specimen, in alcohol - Ecdyonurus criddlei
Copyright © 2013 Mark Melton

Ecdyonurus criddlei - voucher specimen, in alcohol - Ecdyonurus criddlei
Healdsburg, Russian River, Sonoma County, California, USA
April 6, 2013
Size: 9 mm body length
Nymph was identified to genus using Merritt, Cummins and Berg (2008). Identified to species using Bednarik and Edmunds (1980).
The nymph pictured here is mature and differs considerably in coloration from earlier instar nymphs. I've added another set of photos of a less mature nymph in a separate posting of Ecdyonurus criddlei.

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Ecdyonurus criddlei - voucher specimen, in alcohol - Ecdyonurus criddlei Ecdyonurus criddlei - voucher specimen, in alcohol - Ecdyonurus criddlei
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Contributed by Mark Melton on 29 December, 2013 - 3:07pm

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