Andricus glandulae (Hartig, 1840)

on Quercus, agamous generation

Andricus glandulae: gall on Quercus robur

Quercus robur © Roelof Jan Koops

gall

The axillary bud of a leaf is transformed into an obpyriform gall of about half a cm high, often coloured red. The gall has a cover of long, white or violet, adpressed hairs that are directed downwards. Mainly on young shoots in leaf axils.

host plants

Fagaceae, monophagous

Quercus petraea, pubescens, pyrenaica, robur.

Only rarely on Q. robur.


on Quercus, sexual generation

Andricus glandulae FM gall

gall (from Eady & Quinlan, 1963a)

Andricus glandulae: FM gall on Quercus robur

Quercus robur, Belgium, prov. Luxembourg, Durbuy, la vieille Briqueterie de Rome © Carina Van Steenwinkel: the remnant of a locule is still visible

gall

catkin gall. Ovoid gall, less than 2 mm long, derived from a single anther; the gall is not hairy but the surface has a granular structure. The gall develops in the filament, which gives the gall a squat aspect and explains why it is broadly attached basally; the gall formation extends somewhat to the rachis of the catkin, that locally is swollen. Galls in May-June.

host plants

Fagaceae, monophagous

Quercus petraea, pubescens, robur.

synonyms

Andricus xanthopsis von Schlechtendal, 1883.

references

Azmaz & Katılmış (2015a), Béguinot (2002f, 2007b), Bellman (2012a), Blanes-Dalmau, Caballero-López & Pujade-Villar (2017a), Buhr (1965a), Dauphin & Aniotsbehere (1997a), Eady & Quinlan (1963a), Hellrigl (2009a), Hellrigl & Bodur (2015a), Houard (1908a), Koops (2013a), Kwast (2014a), Meiklejohn (2005a), Melika (2006a), Melika, Csóka & Pujade-Villar (2000a), Mutun & Dinç (2014a), Nieves-Aldrey (2001a), Nieves-Aldrey, Gómez, Hernández Nieves & Lobo (2006a), Pujade (1986a), Redfern & Shirley (2011a), Roskam (2009a), Tavares (1905a), Tomasi (2014a), Wiebes-Rijks (1976a), Williams (2010a).

mod 22.viii.2019