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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Flies (Diptera) » "Nematocera" (Non-Brachycera) » Gnats, Gall Midges, and March Flies (Bibionomorpha) » Fungus Gnats and Gall Midges (Sciaroidea) » Gall Midges and Wood Midges (Cecidomyiidae) » Gall Midges (Cecidomyiinae) » Cecidomyiidi » Asphondyliini » Polystepha » Polystepha pilulae
Photo#583645
gall on oak - Polystepha pilulae
Copyright © 2011 Ilona L.

gall on oak - Polystepha pilulae
Cross Plains, Dane County, Wisconsin, USA
October 2, 2011
iNatauralist

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gall on oak - Polystepha pilulae galls on oak - Polystepha pilulae gall on oak - Polystepha pilulae
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Contributed by Ilona L. on 2 October, 2011 - 10:40pm
Last updated 28 January, 2023 - 5:52pm

Moved
Moved from Unidentified Galls.
… Adam Kranz, 28 January, 2023 - 3:47pm login or register to post comments

Size
About how big are these?
… Charley Eiseman, 1 February, 2012 - 9:42am login or register to post comments

 
galls
The galls (not including red part on leaf) were probably around 5mm. Would a photo of the entire leaf help? I still have those photos.
… Ilona L., 1 February, 2012 - 11:34am login or register to post comments

Host plant...
...appears to be Northern Pin Oak (Quercus ellipsoidalsis), although it might be a shade leaf of Northern Red Oak (Q. rubra). Both are in the "red oak" group.
… John Pearson, 3 October, 2011 - 11:15am login or register to post comments

 
Black Oak
I have re-examined this photo and now suspect these to be shade leaves of Black Oak (Quercus velutina).
… John Pearson, 9 October, 2011 - 4:56pm login or register to post comments

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