Andricus corruptrix Hymenoptera: Cynipidae - gall wasp
Andricus corruptrix

Agamic generation - photographs on Quercus, Oak

Agamic generation on Quercus petraea, pubescens, robur
Sexual generation on Quercus cerris

Agamic - a usually terminal hard, woody, thin-walled gall with up to 5 weakly rounded lobes. Mature galls have a slightly pointed tip

Sexual - smooth bud gall 2-2.5mm with pointed tip, very thin-walled with the lower half hidden by bud scales. Sexual galls and adults of A.lignicola, corruptrix, kollari are very difficult to separate

Andricus corruptrix
Andricus corruptrix
Broadstone, Dorset. September 2017

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