Unknown gall.
Quercus chrysolepis, tomentella
Leaf galls, integral
Oval parenchyma thickening of leaf blade, 3 mm, exit hole above. Fig 120.
Fig 120 Only empty galls seen May to September. May be the same as Fig. 128.
”- LH Weld: (1957) Cynipid Galls of the Pacific Slope©
Reference: https://babel.hathitrust.org/cgi/pt?id=coo.31924018313555&view=1up&seq=85