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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Ants, Bees, Wasps and Sawflies (Hymenoptera) » "Parasitica" - Parasitoid Wasps » Chalcidoid Wasps (Chalcidoidea) » Eurytomidae » Eurytominae » Sycophila
Photo#265863
Pteromalidae (emerged from Disholcaspis quercusmamma gall) - Sycophila
Copyright © 2009 MJ Hatfield

Pteromalidae (emerged from Disholcaspis quercusmamma gall) - Sycophila
Ames, Story County, Iowa, USA
Size: 2- mm

Emerged before 13-Apr-2009 from Disholcaspis quercusmamma galls collected Oct 28, 2008:
Larva cut from 1 gall:
tag · login or register to post comments
Contributed by MJ Hatfield on 13 April, 2009 - 9:17pm
Last updated 21 October, 2012 - 8:36pm

Moved
Moved from Pteromalids.
… MJ Hatfield, 21 October, 2012 - 8:36pm login or register to post comments

Pteromalid...
The armored expanded thorax and swollen femora are characteristic of pteromalids. Resembles Bubekia, a genus that attacks hessian flies. Nice set of images.

See reference here:
http://bugguide.net/node/view/16408
… Ross Hill, 15 April, 2009 - 2:46pm login or register to post comments

 
Eurytomidae
This wasp is not a pteromalid, it is a eurytomid. More specifically it is in the genus Sycophila. The rectangular collar-like pronotum indicates the family Eurytomidae. The infumation on the forewings and metasomal shape are characteristic of Sycophila (the shape of the metasoma for Eurytoma is much different from Sycophila). A list of Sycophila species reared from Dqm is listed here:

http://www.nhm.ac.uk/research-curation/research/projects/chalcidoids/database/namedHost.dsml?searchPageURL=indexNamedHost.dsml&HOSTFAMILY=Cynipidae&HOSGENUSqtype=equals&HOSGENUS=Disholcaspis+&HOSSPECIESqtype=equals&HOSSPECIES=quercusmamma

From my experience, Sycophila dubia is the most common p'toid of Dqm (reared from both the sexual and asexual generations) but this depends on the area.
… CMcEwen, 21 October, 2012 - 4:47pm login or register to post comments

 
Ross, Thank you for your help
Ross, Thank you for your help. I'm watching the galls to see what else emerges.
… MJ Hatfield, 16 April, 2009 - 8:46am login or register to post comments

Moved
Moved from Oak Rough Bulletgall Wasp.
… Charley Eiseman, 13 April, 2009 - 11:10pm login or register to post comments

Parasite, not gall-maker.
This is a parasitic chalcid of some kind (not sure of family, even). Galls often produce parasites as frequently as they produce the original occupants.
… Eric R. Eaton, 13 April, 2009 - 9:55pm login or register to post comments

 
Eric,Thanks. And thanks for
Eric,
Thanks. And thanks for reminding me about the inherent dangers of "assuming". (I knew better too.) Can you tell me anything about ? There are still many galls in the jar so I'll look at any future emergences more closely and not "assume" they are the same insect.
… MJ Hatfield, 14 April, 2009 - 6:08am login or register to post comments

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