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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Mayflies (Ephemeroptera) » Pisciforma » Heptagenioidea » Flatheaded Mayflies (Heptageniidae) » Maccaffertium » Maccaffertium modestum
Photo#1803591
Ephemeroptera Family & Genus Unknown - Maccaffertium modestum
Copyright © 2020 Gregg Petersen

Ephemeroptera Family & Genus Unknown - Maccaffertium modestum
Columbia, Howard County, Maryland, USA
April 22, 2020
Size: 11mm
Middle Patuxent River, large for a mayfly larva, appears to have distinctive trailing 1 mm long filaments at the posterior end of the 7th tergum, antennae appears to be less than 2x the width of the head, with cerci, length is 17mm.
Contributed by Gregg Petersen on 23 April, 2020 - 10:30am
Last updated 23 April, 2020 - 5:56pm

Moved
Moved from Mayflies.
… Roger Rohrbeck, 23 April, 2020 - 5:56pm

Maccaffertium modestum
Hi Gregg-

I believe this mayfly nymph to be Maccaffertium modestum.
… Roger Rohrbeck, 23 April, 2020 - 5:52pm

Moved for expert attention
Moved from ID Request.
… Ken Wolgemuth, 23 April, 2020 - 11:48am

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