Hymenoptera: Cynipidae - gall wasp Andricus grossulariae Photographs: Agamic generation on Quercus robur, Common Oak. Sexual generation on Quercus cerris, Turkey Oak Hosts: Agamic generation on Quercus petraea, robur Sexual generation on Quercus cerris, x hispanica, infectoria Agamic - late summer and autumn, multi-chambered with flattened spines Sexual - catkin galls in spring, 6mm high with pointed tips First recorded in south of Britain approx. 2000, spreading rapidly north

Andricus grossulariae
Upton Country Park, Dorset. September and December 2017. January 2018