Trichoteras coquilletti (Hymenoptera: Cynipidae)   (Synonym: Andricus coquilletti)
Little Oak Apple Gall Wasp
Atchison Campground, Mendocino National Forest, Glenn County, California
May 21, 2012

Wasp-induced leaf gall on Quercus chrysolepis (canyon live oak), cut open to expose radiating fibers around larval chamber in the center of the gall.