Andricus quercuscorticis (Linnaeus, 1761)

on Quercus, agamous generation

Andricus quercuscorticis: galls on Quercus robur stem

Quercus robur, Belgium, East Flanders, Balegem, Oosterzele @ Bart Uitterhaegen: the galls mainly occur in callus tissue

Andricus quercuscorticis: galls on Quercus robur stem

detail: fresh and vacated, weathered, galls

Andricus quercuscorticis: galls on Quercus robur stem

Quercus robur, Belgium, East Flanders, Geraardsbergen, Dendervallei Onkerzele @ Bart Uitterhaegen: these fresh galls are intensely visited by ants

Andricus quercuscorticis galls: vacated galls on Quercus robur

Quercus robur, Belgium, prov Liège, Mortroux: vacated, but not yet weathered galls © Jean-Yves Baugnée

parasite

Groups of ± 6 mm large, more or less conical, green to brown galls, embedded in the bark of mature trees. Galls are mature in May.

hostplants

Fagaceae, monophagous

Quercus lusitanica, petraea, pubescens, pyrenaica, robur.


on Quercus, sexual generation

Andricus quercus corticis FM gall

the original drawing of the synonymous Andricus gemmatus (from Adler, 1881a).

Andricus quercuscorticis FM gall on Quercus robur

Quercus robur, Germany, Saarland, Bexbach © Volker Fäßler

gall

Bud gall. Egg-shaped, thin-walled, smooth, gall in a leaf axil, with a narrowed base attached to the scars of fallen bud scales, up to 2.5 mm large, (almost) completely hidden by the remaining bud scales. Galls in May-June, green at first, later brown.

hostplants

Fagaceae, monophagous

Quercus lusitanica, petraea, pubescens, pyrenaica, robur.

synonyms

Andricus corticis Hartig, 1840; A. gemmatus Adler, 1881; A. krajnovici Tavares, 1901.

inquilines

Synergus incrassatus.

references

Bellmann (2012a), Buhr (1965a), Cerasa (2015a), Cogolludo (1921a), Dauphin & Aniotsbehere (1997a), Eady & Quinlan (1963a), Hellrigl (2009a), Hellrigl & Bodur (2015a), Houard (1908a), Katılmış & Kıyak (2008a), Kemal & Koçak (2010a), Koops (2013a), Kwast (2012a, 2014a), Meika (2006a), Melika, Csóka & Pujade-Villar (2000a), Nieves-Adrey (1983a, 2001a), Nieves-Aldrey, Gómez, Hernández Nieves & Lobo (2006a), Redfern & Shirley (2011a), Roskam (2009a), Tomasi (2014a), Williams (2010a).

mod 18.viii.2018