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).

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