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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) » Oak Gall Wasps (Cynipini) » Acraspis
Photo#1317082
GALLS ON OAK LEAF - Acraspis
Copyright © 2016 John Massey

GALLS ON OAK LEAF - Acraspis
Dieppe, westmorland County, New Brunswick, Canada
November 25, 2016
suspect gall on oak leaf. Insect causal agent??
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Contributed by Nelson Poirier on 25 November, 2016 - 6:13pm
Last updated 21 December, 2016 - 8:43am

Moved
Moved from ID Request.
… Charley Eiseman, 21 December, 2016 - 8:43am login or register to post comments

Acraspis erinacei?
They look slightly better-formed and with shorter, redder hairs than the ones from Andricus quercuslanigera, which is the "wooly oak gall" wasp we have down here in Texas.

A little Googling gives me, maybe, Acraspis erinacei, the "hedgehog gall", if the tree was a species of white oak. Does that look right to you? I just got into oak galls, somewhat accidentally, a couple of months ago, so I'm developing an eye for them but shouldn't be counted as an expert.

The photos of A. erinacei galls on BugGuide seem to show either slightly younger fresher examples, or older harder ones; but this is the page that convinced me the most, by matching the lumpy, cellular look of the underlying surface: https://matthewwills.com/tag/galls/page/2/
… Jennifer Drummond, 13 December, 2016 - 5:11pm login or register to post comments

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