Andricus sieboldi (Hartig, 1843)

on Quercus, agamous generation

Andricus sieboldi

galls (from Houard, 1908a)

Andricus sieboldi: galls on Quercus petraea/robur

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

Andricus sieboldi: galls on Quercus petraea/robur


Andricus testaceipes: fresh galls on Quercus robur

Quercus robur, Zeewolde, Harderbos © Hans Jonkman

Andricus sieboldi: galls on Quercus

Quercus sp.Belgium, prov. Namur, Viroinval © Stéphane Claerebout: old, weathered galls


characteristically, the gall is vacated though an opening in the side.

agaous generation

Fagaceae, narrowly monophagous

Quercus lusitanica, petraea, pyrenaica, robur.

on Quercus, sexual generation


Conspicuous fusiform swelling of the petiole and/or midrib, initially pale green and smooth, utinaltely brown and ridged. The galls falls with the leaf. Only breeding van distinguish it from the gall of A. testaceipes.

sexual gneration

Fagaceae, narrowly monophagous

Quercus petraea, robur.


Andricus sieboldi and A. testaceipes have long been confused, and the problems seem far from over. see the discussion of testaceipes.


Bellido, Ros-Farré & Pujade-Villar (2003a), Buhr (1965a), 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).

mod 22.viii.2018