Andricus hystrix Kieffer, 1897
Quercus robur (from Houard, 1908a)
Bud gall on the dormant buds of thin branches. The gall itself, 3-4 mm large, thin-walled and woody, is completely hidden under about 30 spines, c. 4 mm long, that point in all directions. The spines touch each other at their base, where they are yellowish, they gradually become thinner distally and are purple in colour; often a tuft of 1-12 whitish short hairs at the very tip.
Quercus ?cerris, infectoria & subsp. veneris, petraea, pubescens, robur.
on Quercus, sexual generation
smooth, light brown, unilocular, very thin-walled bud gall, up to 3 mm long, almost entirely hidden by the bud scales. Characteristic is a lateral carina (Folliot & Pujade-Villar, 2006a).
Regarding the sexual generation see the note under Andricus burgundus. The prediction that was done there about the gall of the sexual generation has not borne out.
Bellmann (2012a), Buhr (1965a), Cerasa (2015a), Folliot & Pujade-Villar (2006a), Hellrigl (2009a), Hellrigl & Bodur (2015a), Houard (1908a), Karaca & Katılmış (2020a), Katılmış & Kıyak (2008a), Kemal & Koçak (2010a), Kwast (2012a), Melika (2006a), Melika, Csóka & Pujade-Villar (2000a), Shachar, Melika, Inbar & Dorchin (2018a), Tomasi (2014a).