Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
 

Register · Log In
HomeGuideID RequestRecentFrassForumsDonateHelp
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Calendar
Upcoming Events

Registration is open for the 2024 BugGuide gathering in Idaho July 24-27

Moth submissions from National Moth Week 2023

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) » Rhithrogena
Photo#1562169
Mayfly Two Tailed Male Spinner - Rhithrogena - male
Copyright © 2018 Verne Lehmberg

Mayfly Two Tailed Male Spinner - Rhithrogena - Male
Gardiner, Montana, Park County, Montana, USA
July 20, 2018
Size: body about hook size 16
I get lost in the key for this two-tailed male spinner. Anyone recognize it? Thanks. It was very yellow in the body as a dun, like a sulfur, but bigger, long penes and dark eyes.
tag · login or register to post comments
Contributed by Verne Lehmberg on 22 July, 2018 - 11:30pm
Last updated 23 July, 2018 - 10:20am

Moved
Moved from Mayflies.
… Roger Rohrbeck, 23 July, 2018 - 10:20am login or register to post comments

Rhithrogena
Hi Verne-

Nice photo. I believe this male imago to be of genus Rhithrogena.
… Roger Rohrbeck, 23 July, 2018 - 10:19am login or register to post comments

 
Rhithrogena
Mr. Rohrbeck,

Thank you for your time and interest in identifying this mayfly. I was not close in my ID. It is appreciated that experts like you will help the mystified like me.

Verne Lehmberg
… Verne Lehmberg, 23 July, 2018 - 8:44pm login or register to post comments

 
Male Genitalia
You are certainly welcome. Incidentally, the male genitalia evident in your photo are its claspers, not its penes. :-)
… Roger Rohrbeck, 24 July, 2018 - 10:39am login or register to post comments

Moved to Mayflies for expert attention
Moved from ID Request.

Others will take the ID further.

Welcome to BugGuide!
… Ken Wolgemuth, 22 July, 2018 - 11:38pm login or register to post comments

Comment viewing options
Select your preferred way to display the comments and click 'Save settings' to activate your changes.

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 © 2003-2024 Iowa State University, unless otherwise noted.

Bugguide is hosted by:

Plant Pathology, Entomology and Microbiology at Iowa State University logo

Printer Friendly Version 		Terms of Use
Privacy Statement
Site Map
Contact