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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Flies (Diptera) » "Acalyptratae" » Tephritoidea » Fruit Flies (Tephritidae) » Tephritinae » Myopitini » Urophora » Canada Thistle Stem Gall Fly (Urophora cardui)
Photo#356716
Urophora cardui on goldenrod - Urophora cardui
Copyright © 2009 Maria Fremlin

Urophora cardui on goldenrod - Urophora cardui
TommyThompson Park, Toronto, Ontario, Canada
October 6, 2009
Size: ~5mm
This larva has the same darkened area as the ones here

Only full-grown larvae develop this dark spiracle plate and this is the state that they will overwinter in the galls; around April they pupate inside brown puparia, see tagged photo. However the conditions in which I've kept a couple of galls seems to have hasten their development, see the adults below. I got this information from the book Plant Galls by Margaret Redfern & R R Askew, Richmond Publishing, UK, 1998.

Images of this individual: tag all
Urophora cardui on goldenrod - Urophora cardui Urophora cardui on goldenrod - Urophora cardui Urophora cardui on goldenrod - Urophora cardui - female Urophora cardui on goldenrod - Urophora cardui - female Urophora cardui on goldenrod - Urophora cardui - female Urophora cardui puparium - Urophora cardui
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Contributed by Maria Fremlin on 6 December, 2009 - 4:58am
Last updated 15 February, 2010 - 2:14am

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