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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.
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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 login or register to post comments

Maccaffertium modestum
Hi Gregg-

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

Moved for expert attention
Moved from ID Request.
… Ken Wolgemuth, 23 April, 2020 - 11:48am login or register to post comments

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