Cynips disticha Hartig, 1840

red wart gall

on Quercus; agamous generation

Cynips disticha gall on Quercus robur

Quercus robur, Frankijk, dép Loiret, Pers-en-Gâtinais © Eugène Vandebeulque

Cynips disticha gall on Quercus robur

gall in side view

Cynips disticha gall on Quercus robur

gall, vertical section

Cynips disticha gall on Quercus robur

larva

Cynips disticha gall

Quercus robur, Dronten © Arnold Grosscurt

gal

De gall is yellow to reddish brown, flat-topped or even navelled, thin but hard-walled, and unique by having two chambers; the larva occupies the lower one. Hibernation in the fallen galls. Galls in June-September, mature in August.

hostplants

Fagaceae, monophagous

Quercus coccifera, ilex, lusitanica, petraea, pubescens, robur, suber.


on Quercus; sexual generation

gall

The sexual generation makes thin-walled, unilocular, zeppelin-shaped galls that are attached with broadened point to the leaf margin, usually at the end of the midrib or a thick lateral vein. They are 3 x 5 mm, finely pubescent, without ridges. Young galls are yellowish, later they turn brown.

hostplants

Fagaceae, monophagous

Quercus petraea, pubescens, robur.

synonyms

Dryophanta disticha.

inquilines

Synergus pallicornis.

references

Béguinot (2002a,e,g,h, 2006a,c, 2007b, 2012a), Bellmann (2012a), Buhr (1965a), Cogolludo (1921a), Dauphin & Aniotsbehere (1997a), Dietrich (2016a), Eady & Quinlan (1963a), Hellrigl (2009a, 2010a), Hellrigl & Bodur (2015a), Houard (1908a), Kollár (2011a), Kwast (2014a), Lambinon, Carbonnelle & Claerebout (2015a), Lambinon, Schneider & Chevin (2003a), Melika (2006a), Melika, Csóka & Pujade-Villar (2000a), Nieves-Aldrey (2001a), Redfern & Shirley (2011a), Roskam (2009a), Tomasi (2014a), Williams (2010a).

mod 22.viii.2018