Hymenoptera: Cynipidae - gall wasp Andricus quercuscalicis Knopper Gall Photographs: Agamic generation (Knopper Gall) on Quercus, Oak Sexual generation on Quercus cerris, Turkey Oak Hosts: Agamic generation on Quercus petraea, robur Sexual generation on Quercus cerris First recorded in Britain in the 1950s (Devon), recorded in Scotland 1995 Agamic - gall initially develops inside the cupula, the acorn stunted, aborted. Large chamber with thin-walled gall and single larva. Additional smaller chambers are caused by parasitoid wasps or iniquilines Sexual - very small conical galls on male catkins.

Andricus quercuscalicis, Knopper Gall
Lytchett Minster, Kingston Lacy, Randalls Hill, Dorset. August and December 2017, March 2018. Sexual galls Upton, May 2018