Andricus amenti Giraud, 1859

on Quercus, agamous generation

gall

bud gall. The gall is unilocular, fusiform, ± 1 cm long, standing on a slender petiole; the tip is rounded, not sharp. The wall is lengthwise striated or grooved and is finely pubescent. The gall is difficult to distinguish from the one caused by Andricus callidoma.

hostplants

Fagaceae, monophagous

Quercus petraea, pubescens.

on Quercus, sexual generation

Andricus amenti FM gall

gall (from Eady & Quinlan, 1963a)

gall

unilocular, thin-walled catkin gall, short yellowish hairy, up to 2 mm long, extending from the catkin axis. The colour is green at first, later brown. The gall develops in the filament; the remnants of the two anthers remain recognisable on the gall as a pair of length ridges. Usually the adjacent flowers of the catkin are normally developed. Galls in May-June.

host plants

Fagaceae, monophagous

Quercus petraea, pubescens, robur.

synonyms

Andricus giraudianus von Dalla Torre & Kieffer, 1910.

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), Kwast (2014a), Melika (2006a), Melika, Csóka & Pujade-Villar (2000a), Nieves-Aldrey (2001a), Redfern & Shirley (2011a), Tomasi (2014a), Williams (2010a).