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Callirhytis quercussuttoni
2222_3378 Photo added 2022-02-05

Callirhytis quercussuttoni (Hymenoptera: Cynipidae)
Knowland Park, Oakland, Alameda County, California
November 7, 2021

Old stem gall caused by gall wasps on Quercus agrifolia. The wasps have emerged, leaving exit holes.

all photos and text © Joyce Gross