Plant Parasites of Europe

leafminers, galls and fungi

Andricus singularis

Andricus singularis Mayr, 1870

on Quercus, sexual generation

Andricus singularis: gall on Quercus cerris

Quercus cerris, gall (from Houard, 1908a).

Aceria singularis: gall on Quercus ilex

Quercus ilex, gall (from Houard, 1908a).


A terminal or lateral bud is transformed into a green, thick-walled, pyriform gall of up to 8 mm length; on the gall some malformed leaves, or even anthers. In the gall a hard, brown, ovoid inner gall that is free only at its tip. Larva solitary, pupation in the gall. The gall can also take the form of a globular, up to 10 mm large, short-hairy swelling if the base of the axis of a male catkin.


Fagaceae, narrowly monophagous

Quercus cerris, ilex, suber.

distribution within Europe

PESI (2024).


Andricus singulus Mayr, 1881.


Bowdrey (2016a), Buhr (1965a), Cerasa (2015a), Dauphin & Aniotsbehere (1997a), de Vere Graham & Gijswijt (1998a), Hellrigl & Bodur (2015a), Hesse (1972a), Houard (1908a), Jennings (2014a), Jennings, Bowdrey & Jennings (2020a), Kwast (2014a), Melika (2006a, 2018a), Melika, Csóka & Pujade-Villar (2000a), Roskam (2009a), Stone, Atkinson, Rokas, Nieves-Aldrey, Melika, Ács, Csóka, Hayward, Bailey, Buckee & McVean (2008a), Tomasi (2014a).

Last modified 3.i.2024