Hymenoptera: Cynipidae - gall wasp Andricus quercusradicis Agamic generation. Identity of adults uncertain Hosts: Agamic on Quercus faginea, petraea, pyrenaica, robur Sexual on Quercus cerris, also Q. faginea, petraea, pyrenaica, robur Agamic - irregularly shaped gall to 5cm, the many chambers each with a single larva. Occurs on shallow or exposed roots and is initially soft, becoming hard and woody. Sexual - swelling in petiole or midrib with single, round gall chamber. More obvious swelling when several galls coalesce. Adult needs rearing to separate from identical gall of A. testaceipes

Andricus quercusradicis
Kingston Lacy and Randalls Hill, Dorset. February and March 2018