Hymenoptera: Cynipidae - gall wasp Andricus curvator Sexual generation - photographs on Quercus, Oak Hosts: Agamic and sexual generations on Quercus canariensis, faginea, petraea, pubescens, pyrenaica, robur Agamic (parthenogenic) generation forms smooth bud galls on young shoots in late summer. 2-3mm high, often with a white ring below the tip. Sexual galls usually on leaves (midrib), twigs and at the base of catkins. Gall approx 8mm wide, thin-walled with a small inner gall

Andricus curvator
Corfe Mullen, Dorset. August 2017. Ireland, February 2019