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#1439536
Cecidomyiidae, Diervilla fruits - Asphondylia

Cecidomyiidae, Diervilla fruits - Asphondylia
Twin Springs Park, Winneshiek County, Iowa, USA
August 29, 2017
Winter 2016-2017 Most Diervilla fruits from the 2016 season have senesced but a few are hanging on and, oh, some have holes in them...damage looks similar to this



from northern Minnesota

08/24/17 I finally visit a local Diervilla patch during fruiting time, and yep, a few fruits have holes in them, though it looks like I might be a bit late to the show. Several collected

08/29/17 Collected fruits with holes dissected. Normal Diervilla fruits are multi-chambered, with several seeds per chamber. Pods with holes seem to each have one chamber, maybe two hollowed out, and many pods are misshapen, but mostly, there's little sign of what might have been responsible. But one or two or those misshapen pods have something very interesting still going on inside -- shown here

I think this is one of those partnerships between a fungus (black spheres, white matter) and a cecidomyiid (larvae inside black spheres -- see red arrows). The black spheres are not hollowed-out seeds; Diervilla seeds are larger, less spherical, and lighter in color, with a distinct texturing on the surface.

Images of this individual: tag all
Cecidomyiidae, Diervilla fruits - Asphondylia Cecidomyiidae, Diervilla fruits - Eurytoma Cecidomyiidae, Diervilla fruits - Eurytoma

Moved

Gagne reports
via email that "this is an Asphondylia gall that has been taken over by Eurytoma (Hymenoptera) galls." If anyone can find pupae of the Asphondylia, he would be interested in examining them.

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