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).