Andricus gracilicornis (Kieffer, 1900)
6 mm high, 11 mm wide and 7 mm thick bud gall, folding around part of the base of a shoot. The wall is thick, brownish, bumpy or finely striated, thin and finely hairy. Near the base a 3 mm large inner gall.
Fagaceae, narrowly monophagous
Quercus x hispanica.
distribution within Europe