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EENY-368: Gall Wasps, Callirhytis quercusclaviger (Ashmead) and Callirhytis cornigera (Osten Sacken) (Insecta: Hymenoptera: Cynipidae)

Figure 5. Mature horned oak galls caused by the gall wasp Callirhytis cornigera (Osten Sacken).

Credit: USDA Forest Service, www.forestryimages.org