Cynips divisa Hartig, 1840

red-pea gall

on Quercus, agamous generation

Cynips divisa gall

Quercus robur, Nieuwendam: gall, at underside of leaf

Cynips divisa gall

the wall is thck and hard …….

Cynips divisa gall

and consists of columnar cells

Cynips divisa gall

often the wall harbours one or two inquiline larvae ………

Cynips divisa gall

but they did not prevent this larva to reach the pupal stage

Cynips divisa pupa

pupa

Cynips divisa parasitoid

a parasitoid (with exuvium), attached to a larva

Gall

Galls from June till October, mature in September.

host plants

Fagaceae, monophagous

Quercus canariensis, frainetto, x hispanica, infectoria subsp. veneris, lusitanica, macranthera, petraea, pubescens, pyrenaica, robur.


on Quercus, sexual generation

Cynips divisa gall

galls (from Houard, 1908a)

gall

The sexual generation makes thin-walled, unilocular, lemon-shaped galls that with their tip are attached to a leaf margin, generally at the end on a vein. They are 2 x 3 mm in size, finely pubescent, and have about 10 length ridges. Galls also may be attached to the petiole of a catkin; these are larger, 4-6 mm long, blister-like and somewhat translucent.

host plants

Fagaceae, monophagous

Quercus frainetto, infectoria subsp. veneris, petraea, pubescens, robur.

synonyms

Dryophanta divisa; D. verrucosa (von Schlechtendal, 1870).

inquilines

Synergus pallicornis.

notes

Of the practically unknown Cynips schlechtendali (Kieffer, 1901) it is stated by Houard that the gall is similar to the one of divisa, with the same finely granular surface, “but entirely smooth”.

references

Abras, Fassotte, Chandelier & Cavelier (2008a), Béguinot (2002d,e, 2006a,c, 2007b), Bellmann (2012a)m Blanes-Dalmau, Caballero-López & Pujade-Villar (2017a), Buhr (1965a), Cerasa (2015a), Chinery (2011a), Cogolludo (1921a), Coulianos & Holmåsen (1991a), Dauphin & Aniotsbehere (1997a), Eady & Quinlan (1963a), Ecott (2012a), Groom (2011a), Hellrigl (2009a), Hellrigl & Bodur (2015a), Houard (1908a), Ilie & Marinescu (2011a) Katılmış & Kıyak (2008a), Kemal & Koçak (2010a), Kollár (200a, 2011a), Koops (2013a), Kwast (2012a, 2014a), Lambinon, Carbonnelle & Claerebout (2015a), Lambinon, Schneider & Chevin (2003a), Lehmann & Flügel (2012a), Lehmann & Hannover (2016a), Melika (2006a), Melika, Csóka & Pujade-Villar (2000a), Nieves-Aldrey (2001a), Nieves-Aldrey, Gómez, Hernández Nieves & Lobo (2006a), Redfern & Shirley (2011a), Roskam (2009a), Shachar, Melika, Inbar & Dorchin (2018a), Tomasi (2003a, 2014a), Williams (2010a).

mod 4.ii.2019