Andricus corruptrix (von Schlechtendal, 1870)
on Quercus, agamous generation
gall (from Eady & Quinlan, 1963a)
Quercus robur, Eerbeek, Coldenhove, 26.vi.2022 © Arnold Grosscurt

Quercus robur, Belgium, prov. Flemish Brabant, Galmaarden-Kluysbos @ Bart Uitterhaegen: fresh gall (March)

opened gall with larva (December)

Quercus robur, België, prov. Oost-Vlaanderen, Velzeke-Ruddershove – Reservaat Jan De Lichte @ Bart Uitterhaegen: old, vacated gall

other specimen
gall
mostly terminal, smooth gall, that develops from the base of a bud; the bud itself shrivels, a remnant may still be visible. The gall is lignified, weakly swollen with an impressed tip, indistinctly 4-5-lobed, obviously not wrapped in bud scales. Each lobe ends in a small point, often with length grooves.
host plants
Fagaceae, narrowly monophagous
Quercus canariensis, montana, petraea, pubescens, robur.
on Quercus, sexual generation

Quercus cerris, Belgium, Bruxelles, Ixelles, Jardin du Roi @ Bart Uitterhaegen

vacated gall

gall, dissected out
gall
very thin-walled, ovoid or conical bud gall, 2-2.5 mm long 2, almost always single; the lower half is hidden by bud scales. Its surface is brown, nearly smooth, without striation and with a short, deciduous pubescence. The tip is pointed, not rounded.
host plants
Fagaceae, narrowly monophagous
Quercus cerris.
synonyms
Andricus ambiguus Trotter, 1899; Cynips ambigua, corruptrix.
inquilines
Synergus gallaepomiformis. pallicornis, pallipes, tibialis.
parasitoids, predators
Bootanomyia dorsalis; Eupelmus urozonus; Mesopolobus amaenus, tibialis; Ormyrus pomaceus.
references
Béguinot (2006c), Bellido, Melika & Pujade-Villar (2005a), Bellido, Ros-Farré, Melika & pujade-villar (2003a), Bellmann (2012a), Buhr (1965a), Burton, Carbonnelle, Ellis & Schneider (2019a), Burton, Ellis & Schneider (2022a), Chinery (2011a), Dauphin & Aniotsbehere (1997a), Docters van Leeuwen & Dehuijzen-Maasland (1956a, 1958a), Eady & Quinlan (1963a), Ecott (2012a), Folliot, Ros-Farré, Bellido & Pujade-Villar (2004a), Hellrigl (2009a, 2010a, 2012a), Hellrigl & Bodur (2015a), Houard (1908a), Katılmış & Kıyak (2008a), Kemal & Koçak (2010a), Koops (2013a), Kwast (2012a), Melika (2006a), Melika, Csóka & Pujade-Villar (2000a), Redfern & Shirley (2011a), Roskam (2009a), Tomasi (2014a), Wiebes-Rijks (1978a), Williams (2010a).