Andricus foecundatrix (Hartig, 1840)

on Quercus robur etc., agamous generation

Andricus foecundatrix: galls on Quercus robur

Quercus robur, Hungary, Budapest © László Érsek

Andricus foecundatrix: gall on Quercus robur

detail

Andricus foecundatrix: gall on Quercus robur

opended gall, the inner gall is visible

Andricus foecundatrix: gall on Quercus robur

opened inner gall

Andricus foecundatrix: gall on Quercus robur

detail of the inner gall

Andricus foecundatrix FF gall

Quercus robur, Belgium, prov. Luxembourg, Arlon © Jean-Yves Baugnée

Andricus foecundatrix FF gall on Quercus robur

Quercus robur, RBB Dronten, Roggebotbos © Hans Jonkman: the hard- and thick-walled inner gall is pushed out at maturity

Andricus foecundatrix gall

Quercus robur, Tilburg, de Kaaistoep: lateral scales of the gall

Andricus foecundatrix gall

scales of the tip of the gall

Andricus foecundatrix gall

inner gall

Andricus foecundatrix gall

opened inner gall

Andricus foecundatrix gall

Quercus robur, Enter © Arnold Grosscurt. This picture, taken in late April, shows that the inner gall, with living larva, may remain within the gall till well after the winter.

Andricus foecundatrix: old gall

Quercus robur Zeewolde, Harderbos © Hans Jonkman: old gall (October)

gall

Up to a cm large globular bud gall consisting of enlarged and over-numerous bud scales. In the central gall cavity an inner gall with a smooth, brown, woody wall. Galls from June.

hostplants

Fagaceae, monophagous

Quercus faginea, frainetto, x hispanica, lusitanica, petraea, pubescens, pyrenaica, robur.


on Quercus robur etc., sexual generation

Andricus foecundatrix catkin galls on Quercus robur

Quercus robur catkin with galls and individual gall (from Houard, 1908a)

Andricus foecundatrix sexual generation gall on Quercus robur

Quercus robur, Germany, Saarland, Bexbach © Volker Fäßler

Andricus foecundatrix sexual generation gall on Quercus robur

This picture shows that not the entire stamen but only one pair of loculi has been galled.

Andricus foecundatrix: sexual generation gall on Qercus robur

Quercus robur, Belgium, prov. Antwerp, Retie, Prinsenpark © Carina Van Steenwinkel

Andricus foecundatrix: sexual generation gall on Qercus robur

detail

_2267_9

an older gall

gall

Unilocular catkin gall. The gall is ovoid, 2-3 mm long, with long, erect white, hairs < diameter of the gall; they are situated amidst normal stamina. Tip of the gall often dark brown. The gall is vacated in May-June.

hostplants

Fagaceae, monophagous

Quercus faginea, frainetto, infectoria, lusitanica, petraea, pubescens, pyrenaica, robur.

synonyms

Andricus fecundator (Hartig, 1840); A. pilosus Adler, 1881.

inquilines

Arnoldiola gemmae; Synergus crassicornis, gallaepomiformis.

references

Abras, Fassotte, Chandelier & Cavelier (2008a), Béguinot (2001c, 2002a,e,g,h, 2003a, 2006a,c, 2007b, 2012a), Bellmann (2012a), Buhr (1965a), Cerasa (2015a), Chinery (2011a), Cogolludo (1921a), Coulianos & Holmåsen (1991a), Dauphin &a Aniotsbehere (1997a), Deckert & Deckert (2016a), Eady & Quinlan (1963a), Groom (2011a), Hellrigl (2009a, 2010a), Hellrigl & Bodur (2015a), Houard (1908a), Ilie & Marinescu (2011a), Katılmış & Kıyak (2008a), Kemal & Koçak (2010a), Kollár (2011a), Koops (2013a), Kwast (2012a, 2014a), Lambinon, Carbonnelle & Claerebout (2015a), Lambinon & Romain (2009a), Lambinon, Schneider & Chevin (2003a) Lehmann & Hannover (2016a), Melika (2006a), Melika, Csóka & Pujade-Villar (2000a), Mete & Demirsoy (2012a), Nieves-Aldrey (1983a, 2001a), Nieves-Aldrey, Gómez, Hernández Nieves & Lobo (2006a), Pellizzari (2010a), Redfern & Shirley (2011a), Roskam (2009a), Skuhravá, Skuhravý & Jørgensen (2006a), Tomasi (2003a, 2012a, 2014a), Wiebes-Rijks (1976a), Williams (2010a).

mod 15.vi.2018