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

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.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa

Photos from the 2010 Workshop in Grinnell, Iowa

Photos from the 2009 gathering in Washington

TaxonomyBrowseInfoImagesLinksBooksData
Photo#893962
Another Callibaetis? - Acerpenna pygmaea

Another Callibaetis? - Acerpenna pygmaea
Champaign County, Illinois, USA
November 17, 2013
collected 11/17, photographed 12/9

Moved
Moved from Mayflies.

Nice shot of a smaller baetid. The carina on the head is visible and the gills on the seventh abdominal segment are teardrop shaped instead of oval. The color pattern is pretty distinctive, too.

 
This mayfly stopped moving in
This mayfly stopped moving in mid-December; would that suggest diapause?

 
Stopped moving
Had you been keeping it alive? If the gills have stopped moving, the mayfly is likely dead. I can't think of any observations of diapause in mayfly nymphs. Eggs, yes. I have a colleague who has worked with stonefly eggs that will diapause. That way a single clutch of eggs can develop across several years/seasons.

 
Yes, it became unresponsive f
Yes, it became unresponsive for unknown reasons.

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