Andricus subterraneus (Giraud, 1859)
Galling of an adventive bud of a shoot that is covered by litter or soil. The gall is cone standing on its tip, 1.5 cm high and about as wide above. The top is dish-shaped with a central nipple. The 3-5 broadly extending flattened spines along the rim that are characteristic of the closely related A. polycerus are virtually missing. In the gall chamber a large, stone-hard inner gall with a coarsely ribbed surface. Larva solitary, pupating in the gall.
Quercus petraea, pubescens, robur.
Only the agamous generation of this species is known.
Bellido & Pujade-Villar (2001a), Cerasa (2015a), Hellrigl & Bodur (2015a), Melika (2006a), Melika, Csóka & Pujade-Villar (2000a).