The gall of a Horned Oak Gall Wasp in Frederick Co., Maryland (6/8/2013). Photo by Jim Brighton. (MBP list)
A Horned Oak Gall Wasp in Howard Co., Maryland (5/27/2017). Photo by Joanne Solem. (MBP list)
Horned Oak Gall Wasp galls in Anne Arundel Co., Maryland (5/13/2020). (c) tswann, some rights reserved (CC BY-NC). Photo by tswann via iNaturalist. (MBP list)
Horned Oak Gall Wasp gall on Willow Oak in Anne Arundel Co., Maryland (2/11/2018). Verified by Charley Eiseman/BugGuide. Photo by Bill Hubick. (MBP list)
Horned Oak Gall Wasp in Worcester Co., Maryland (1/30/2021). (c) johnbotany, some rights reserved (CC BY-NC). Photo by John Hall. (MBP list)
Galls of Horned Oak Gall Wasps on Shingle Oak (Quercus imbricaria) in Montgomery Co., Maryland (4/9/2015). Photo by Jane Hill. (MBP list)
Horned Oak Gall Wasp in Queen Anne's Co., Maryland (11/21/2020). (c) johnbotany, some rights reserved (CC BY-NC). Photo by John Hall. (MBP list)
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Synonyms: Callirhytis cornigera.
