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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Mayflies (Ephemeroptera) » Pisciforma » Heptagenioidea » Flatheaded Mayflies (Heptageniidae) » Maccaffertium
Photo#360459
Mayfly in PA - male subimago - Maccaffertium - male
Copyright © 2009 Abigail Parker

Mayfly in PA - male subimago - Maccaffertium - Male
Mario Lanza Park, Philadelphia County, Pennsylvania, USA
June 23, 2009
Size: ~10mm
Measurement of body only; I know that the long "tails" don't count. That's about all I know of mayflies, though.
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Contributed by Abigail Parker on 23 December, 2009 - 11:03am
Last updated 24 December, 2009 - 9:54am

Moved
Moved from Mayflies.
… Abigail Parker, 24 December, 2009 - 9:49am login or register to post comments

Maccaffertium
Abigail-

I believe your mayfly to be a male subimago of family Heptageniidae and genus Maccaffertium, perhaps M. modestum.
… Roger Rohrbeck, 24 December, 2009 - 4:48am login or register to post comments

 
thank you!
It wasn't very close to a stream - about 1/2 mile from a major river, in fact. Do the larvae live in rivers, or bodies of still water, in addition to streams? I wasn't even sure it was a mayfly when I found it perched on a holly bush in a city park!
… Abigail Parker, 24 December, 2009 - 9:45pm login or register to post comments

 
Mayfly Larvae
Abigail,

Sorry that I didn't respond earlier, but I just discovered your question.

All mayfly larvae are aquatic. Some are found only in moving water, some are found only in still water, and some are found in both types of water. Although Heptageniids (clinger mayflies) are limited to moving water, it can be even be a small graveled brook, just as long as there is constant water flow throughout the year.
… Roger Rohrbeck, 16 August, 2010 - 9:39pm login or register to post comments

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