Andricus sieboldi (Hartig, 1843)
on Quercus, agamous generation
galls (from Houard, 1908a)
Quercus robur, Dronten, Roggebotzand, 31.viii.2019 © Arnold Grosscurt
another image
Quercus petraea/robur, England, Dorset © Jenny Seawright; general aspect; the galls developed on a wound callus on a nearly horizontal branch, approx 3-4 feet above ground level
detail
Quercus robur, Zeewolde, Harderbos © Hans Jonkman
Quercus sp.Belgium, prov. Namur, Viroinval © Stéphane Claerebout: old, weathered galls
gall
characteristically, the gall is vacated through an opening in the side.
host plants
Fagaceae, narrowly monophagous
Quercus lusitanica, petraea, pyrenaica, robur.
on Quercus, sexual generation
gall
Conspicuous fusiform swelling of the petiole and/or midrib, initially pale green and smooth, ultimately brown and ridged. The galls falls with the leaf. Only breeding van distinguish it from the gall of A. testaceipes.
host plants
Fagaceae, narrowly monophagous
Quercus petraea, robur.
synonyms
Andricus sieboldi and A. testaceipes have long been confused, and the problems seem far from over. see the discussion of testaceipes.
parasitoids, predators
Caenacis lauta; Eupelmus urozonus; Eurytoma brunniventris.
references
Askew (1961b), Bellido, Ros-Farré & Pujade-Villar (2003a), Blanes-Dalmau, Caballero-López & Pujade-Villar (2017a), Buhr (1965a), Burton, Carbonnelle, Ellis & Schneider (2019a), Burton, Ellis & Schneider (2022a), Cerasa (2015a), Chinery (2011a), Cogolludo (1921a), Coulianos & Holmåsen (1991a), Dauphin & Aniotsbehere (1997a), Hellrigl (2009a), Hellrigl & Bodur (2015a), Houard (1908a), Kwast (2014a), Meika (2006a), Melika, Csóka & Pujade-Villar (2000a), Nieves-Aldrey (2001a), Pujade (1986a), Redfern & Shirley (2011a), Roskam (2009a), Tavares (1905a).