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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Mayflies (Ephemeroptera) » Pisciforma » Heptagenioidea » Flatheaded Mayflies (Heptageniidae)
Photo#1122333
8016527 Mayfly
Copyright © 2015 Rob Curtis

8016527 Mayfly
Kanakakee river SP, Illinois, USA
August 14, 2009
Size: ~1/2"
Roger, I wonder if some of my older ones could go further.

Images of this individual: tag all
8016527 Mayfly 8016527 Mayfly
Contributed by Rob Curtis on 15 August, 2015 - 4:44pm

Maccaffertium
It is without a doubt a female Maccaffertium. Based on samples I have collected in my area being southern Ontario this aligns with my samples of pulchellum. There are classic marking on the abdomen having a dark 10th, light 9th, dark 8th, light 7th, dark 6th, light 5th with all the light segments being spotty. pulchellum also has intensely black banded femora. Maccaffertium for sure pulchellum very likely.


Mack.
… The Stenonema Rangers of Ontario, 6 April, 2017 - 7:07pm

 
glad to know, thanks
glad to know, thanks
… Rob Curtis, 7 April, 2017 - 10:38am

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