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

Discussion, insects and people from the 2018 BugGuide 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.

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#308998
Goldenrod gall fauna

Goldenrod gall fauna
Pennypack Restoration Trust, Montgomery County, Pennsylvania, USA
July 22, 2009
Size: Less than 2mm Gall 4-5mm
I never find more than one pupa, be it host or parasitoid, inside these little goldenrod galls (1, 2), and I have opened quite a few. So I was surprised to find three larvae. Is cannibalism going on?

More on goldenrod galls fauna.

Images of this individual: tag all
Goldenrod gall fauna Goldenrod gall fauna

Moved

Moved
Moved from ID Request.
Dr. Gagne thinks that these are parasitoids.

Moved
Moved from Flies.
Yes, they may Hymenopteran after all.

Inquilines?
I'm not even sure whether these larvae are dipteran or hymenopteran, but I thought I'd pass along this information about Asphondylia solidaginis galls from Gagne (1): "Other gall midges have reportedly been reared from these galls: Trotteria caryae (Felt) and Camptoneuromyia adhesa (Felt). The first is an inquiline and the other two may also be." Yes, he says "the other two" even though he only mentions a total of two. You might try asking him for his thoughts--and perhaps he could tell us whether the adult midge currently in the guide is in fact this species or one of the inquilines (and maybe even shed light on your mystery).

 
I will do that
Thanks. We have several mysteries with all this goldenrod fauna. We could use some help.

Moved
Moved from ID Request.

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