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

Interested in a 2022 BugGuide gathering in New Mexico?

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

National Moth Week 2020 photos of insects and people.

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

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

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Previous events


TaxonomyBrowseInfoImagesLinksBooksData
Photo#882096
Ephemerella tibialis - voucher specimens, in alcohol - Ephemerella tibialis

Ephemerella tibialis - voucher specimens, in alcohol - Ephemerella tibialis
Healdsburg, Mill Creek Road, Mill Creek, Sonoma County, California, USA
May 12, 2009
Size: 6-9 mm body length
I've included several individuals in this account since color varies considerably depending on the maturity of the nymph. I've noticed this species listed under Serratella tibialis in BugGuide. The species name has been changed to Ephemerella tibialis. See ITIS account. Keyed to genus using Merritt, Cummins and Berg (2008) and keyed to species using Allen and Edmunds' " A Revision of the Genus Ephemerella (Ephemeroptera: Ephemerellidae) VI. The subgenus Serratella in North America". 1963.

Images of this individual: tag all
Ephemerella tibialis - voucher specimens, in alcohol - Ephemerella tibialis Ephemerella tibialis - voucher specimens, in alcohol - Ephemerella tibialis Ephemerella tibialis - voucher specimens, in alcohol - Ephemerella tibialis Ephemerella tibialis - voucher specimens, in alcohol - Ephemerella tibialis

I've read that Ephemerella tibialis emerges in late summer/fall
If that is correct, I'm surprised to see such mature nymphs from spring. Could the species ID be incorrect, or perhaps my information on emergence timing is wrong? Any thoughts?

 
E. tibialis
Bill - If it was only one year, I could have doubts about the time they were found in the creek but I lived on the creek for seven years and they always showed up in May or June. As for the ID being incorrect, its always possible, but I was very careful in trying to get it correct.

Moved
Moved from Ephemerella.

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