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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Ants, Bees, Wasps and Sawflies (Hymenoptera) » "Parasitica" - Parasitoid Wasps » Cynipoidea » Gall Wasps (Cynipidae) » Herb Gall Wasps (Aulacideini) » Aulacidea » annulata or tumida (Aulacidea annulata or tumida)
Photo#725539
stem gall on wild lettuce - Aulacidea
Copyright © 2012 John Pearson

stem gall on wild lettuce - Aulacidea
Ackworth, Warren County, Iowa, USA
November 24, 2012
Size: 25 mm wide
Single swelling discovered on tall, lignified, post-growing season stem of Wild Lettuce (Lactuca cf. canadensis) in grassy old field.

Images of this individual: tag all
stem gall on wild lettuce - Aulacidea stem gall on wild lettuce - Aulacidea stem gall on wild lettuce - Aulacidea
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Contributed by John Pearson on 24 November, 2012 - 8:45am
Last updated 18 February, 2022 - 4:09pm

Moved
Moved from Aulacidea.
… Louis Nastasi, 18 February, 2022 - 4:09pm login or register to post comments

Moved
Moved from Unidentified Galls.
Is there any chance this one was actually something asteraceous?

Certainly a similar-looking gall; I think it must be cynipid as well.
… Charley Eiseman, 29 November, 2012 - 6:35pm login or register to post comments

 
Yes
Glad you remembered that image from 3 years ago, Charley! (As I have observed before, you would make a great contestant on the old "Concentration" game!). In light of the strong similarity of these images, I think it quite likely that my dried stem of "wild carrot" back in 2009 was instead a dried stem of wild lettuce. Both images were from old fields where Lactuca canadensis would be right at home.
… John Pearson, 29 November, 2012 - 6:49pm login or register to post comments

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