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
BugGuide Gathering
Pack Forest
Washington State
July 10-12, 2009
Details...

Photos from the 2009 gathering
 
Photos from the 2008 gathering in Tennessee
 
Photos from the 2007 gathering in Minnesota

TaxonomyBrowseInfoImagesLinksBooksData
Home » Guide » Arthropods (Arthropoda) » Insects (Insecta) » Mayflies (Ephemeroptera) » Small Minnow Mayflies (Baetidae) » Callibaetis » Callibaetis pretiosus
Photo#144179
Small Minnow Mayfly - Callibaetis pretiosus - female
Copyright © 2007 tom murray

Small Minnow Mayfly - Callibaetis pretiosus - Female
Groton, Middlesex County, Massachusetts, USA
September 7, 2007
tag · login or register to post comments
Contributed by tom murray on 9 September, 2007 - 9:07am
Last updated 24 July, 2009 - 7:11pm

Moved
Moved from Callibaetis.
… tom murray, 24 July, 2009 - 7:10pm login or register to post comments

Callibaetis
Although the darker 7th tergite is just barely discernable on this dark female, the undulating border of the vitta (compared to the more ragged appearance of most ferrugineus females), and single marginal intercalaries (usually double through the middle of the wing in ferrugineus) help to reinforce the ID.

C. pretiosus is an interesting species. Not only do the marginal intercalaries vary from single to double among specimens, but it appears to be the only Callibaetis species where the number and distribution of cross veins varies significantly from male to female (few in the males, and more in the females).
… Lloyd Gonzales, 24 July, 2009 - 7:09pm 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 © 2003-2009 Iowa State University, unless otherwise noted.

Bugguide is hosted by Iowa State University Entomology.

Printer Friendly Version 		Terms of Use
Privacy Policy
Site Map
Contact