neuroterus numismalis, gall wasp on the underside of a oak leaf tree

abnormal andricus animal autumn blister blossom branch brown bug button closeup common cynipid cynipidae deciduous disease eggs entomology flower food fruit gall galls green group growth growths hymenoptera infection infestation insect invertebrate knob larvae leaf macro nature neuroterus numismalis oak parasite parasites parasitic pedunculate pest plant produce quercus reproduction robur shimmering shrub silk sunlight surrounded tree underside wasp