tan mayfly with big white eyes - Maccaffertium mediopunctatum - BugGuide.Net

HomeGuideID RequestRecentFrassForumsDonateHelp

Clickable Guide

Calendar

Upcoming Events

Photos of insects and people from the 2024 BugGuide gathering in Idaho July 24-27

Moth submissions from National Moth Week 2024

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29

Previous events

TaxonomyBrowseInfoImagesLinksBooksData

Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Mayflies (Ephemeroptera) » Pisciforma » Heptagenioidea » Flatheaded Mayflies (Heptageniidae) » Maccaffertium » Maccaffertium mediopunctatum » Maccaffertium mediopunctatum mediopunctatum

Photo#1938982

Copyright © 2021 Larry Reis

tan mayfly with big white eyes - Maccaffertium mediopunctatum -

Cardinal Marsh, Winneshiek County, Iowa, USA
May 29, 2020
Size: ~15 mm

I hope I didn't narrow this mayfly down too far down in the mayfly Order but I didn't see anything but flatheaded mayflies from Iowa with these big "white" eyes and distinctive stripe through the middle. I've got a mayfly with eyes like this that was identified to the Genus Maccaffertium but it had different body colors. If I remember right, these eyes can be black depending on the lighting.

Images of this individual: tag all

tan mayfly with big white eyes - Maccaffertium mediopunctatum - male

tan mayfly with big white eyes - Maccaffertium mediopunctatum - male

tag · login or register to post comments

Contributed by Larry Reis on 9 February, 2021 - 10:27am
Last updated 9 February, 2021 - 5:12pm

Moved

Moved from Mayflies.

… Roger Rohrbeck, 9 February, 2021 - 5:12pm

login or register to post comments

Moved

Moved from Flatheaded Mayflies.

… Larry Reis, 9 February, 2021 - 10:39am

login or register to post comments

I'm not sure...

...whether or not Roger looks at placements this deep. We generally move all mayflies to Ephemeroptera where we know he'll see them.

… Ken Wolgemuth, 9 February, 2021 - 10:34am

login or register to post comments

Flatheaded mayfly

Thanks for the information, Ken. I'll move it to Ephemeroptera.

… Larry Reis, 9 February, 2021 - 10:39am

login or register to post comments

Maccaffertium mediopunctatum mediopunctatum

Hi Larry-

Thanks. I believe this male subimago to be of genus Maccaffertium , probably (but not necessarily) Maccaffertium mediopunctatum mediopunctatum.

… Roger Rohrbeck, 9 February, 2021 - 5:11pm

login or register to post comments

Maccaffertium mediopunctatum

Thanks so much for identifying this male mayfly as being Maccaffertium mediopunctatum, Roger! I see that Winneshiek County is a hotbed for this mayfly in Iowa! With your help I'm starting to build a nice little photo library of the mayflies we have in my area. I'm also a fly fisher so I've always been fascinated by mayflies and their relationship with the trout in our coldwater streams.

… Larry Reis, 9 February, 2021 - 8:49pm

login or register to post comments

Disclaimer: Dedicated naturalists volunteer their time and resources here to provide this service. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world. If you need expert professional advice, contact your local extension office.

Contributors own the copyright to and are solely responsible for contributed content.
Click the contributor's name for licensing and usage information.
Everything else copyright © 2003-2025 Iowa State University, unless otherwise noted.

Bugguide is hosted by:

Printer Friendly Version

Terms of Use
Privacy Statement
Site Map
Contact