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 Acorn-plum gall wasp (Amphibolips quercusjuglans)




Acorn-plum gall wasp | Amphibolips quercusjuglans photo
two Acorn-plum galls (Amphibolips quercusjuglans) formed on the outside of an acorn cupon Northern pin oak (Quercus ellipsoidalis).taken in Sawyer Co., Wisconsin, United States

Photograph by Steven Katovich, USDA Forest Service, Bugwood.org. Some rights reserved.  (view image details)

ACORN-PLUM GALL WASP FACTS

Description
The Acorn-plum gall wasp is a small wasp that produces galls on the cups of acorns. The galls are pinkish red becoming brown with age. The tiny adult wasps are dark brown with blackish abdomen. The larva is a small white grub that is found inside the gall. This species should not be confused with the Oak apple Gall wasp which produced galls on the leaves but not the acorns.

Environment
oak trees

Food
the larvae feed on the tissue inside the gall

Breeding
the larvae develops inside the gall and emerges as an adult wasp

Classification
Class:Insecta
Order:Hymenoptera
Family:Cynipidae
Genus:Amphibolips
Species:quercusjuglans
Common Name:Acorn-plum gall wasp


Relatives in same Genus
  Oak Apple Gall Wasp (A. confluenta)