Quercus robur, Biddinghuizen, Spijk- en Bremerbergbos, 21.ix.2015 © Hans Jonkman

same leaf, underside

Quercus robur, Hungary, Mosonmagyaróvár, 19.vii.2019 © László Érsek

rear side of the gall, after this has been taken from the leaf

transverse section

opened gall

Quercus robur, Rheden, 7.ix.2006

a single gall

section

gall

Galls from August, mature in September.

host plants

Fagaceae, monophagous

Quercus cerris, dalechampii, frainetto, x hispanica, infectoria & subsp. veneris, lusitanica, macranthera, petraea, pubescens, robur, rubra, suber.

on Quercus, sexual generation

Quercus robur, Hongarije, Mosonmagyaróvár, 19.vii.2019 © László Érsek: upper side of the gall

the upper side if the gall bears a characteristic pattern

gall, lighted from behind, already with an imago

gall, underside

]

opened gall with fresh pupa

opened gall with pupa

pupa (with exit opening of a parasitoid)

imago

Quercus robur, France, dép. Loiret, Pers-en-Gâtinais, 29.vi.2018 © Eugène Vandebeulque; two galls, upper side

same galls, underside

vertical section; the galls are unusually high

Quercus robur, Belgium, prov. Limbourg, Gerhoeven, de Rammelaars © Carina Van Steenwinkel: old gall, upper side

underside of a gall

Quercus robur, Quercus robur, Belgium, prov. Limbourg, Lanaken, de Hoefaert © Carina Van Steenwinkel, old galls

underside

Quercus robur, Dronten © Arnold Grosscurt: young gall

detail

parasite

The gall is an unilocular mostly rather low disc in the leaf tissue, about equally protruding at either side, with a diameter of ± 3 mm. At the one of the sides the gall has a small central pimple and the surface is radially striated. There is no inner gal.

host plants

Fagaceae, monophagous

Quercus cerris, infectoria & subsp, veneris, petraea, pubescens, pyrenaica, robur.

synonyms

Neuroterus defectus Hartig, 1840; N. numismatis Olivier, 1790; ; N. vesicatrix von Schlechtendal, 1870; N. vesicator Hieronymus, 1890.

parasitoids, predators

Aprostocetus aethiops; Aulogymnus arsames; Eurytoma brunniventris; Mesopolobus fasciiventris, fuscipes, tibialis; Ormyrus pomaceus; Pediobius lysis.

references

Abras, Fassotte, Chandelier & Cavelier (2008a), Andersen & Fjellberg (1977a), Askew (1961b), Béguinot (2001c, 2002a,d,f,g,h, 2003a,c, 2005a, 2006c, 2007b, 2012a), Bellmann (2012a), Blanes-Dalmau, Caballero-López & Pujade-Villar (2017a), Buhr (1965a), Cerasa (2015a), Chinery (2011a), Coulianos & Holmåsen (1991a), Dauphin & Aniotsbehere (1997a), Eady & Quinlan (1963a), Ecott (2012a), Flügel (2016a), Groom (2011a), Hellrigl (2009a), Hellrigl & Bodur (2015a), Houard (1908a), Ilie & Marinescu (2011a), Jankiewicz, Dyki, Machlatiska & Dubert (2017a), Karaca & Katılmış (2020a), Katılmış & Kıyak (2008a), Kemal & Koçak (2010a), Kollár (2007a, 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 (1984b, 2001a), Nieves-Aldrey, Gómez, Hernández Nieves & Lobo (2006a), Pellizzari (2010a), Pujade-Villar (2005b), Redfern & Shirley (2011a), Roskam (2009a), Shachar, Melika, Inbar & Dorchin (2018a), Tavares (1905a), Tomasi (2012a), Vilarrubia Garet (1956a), Williams (2010a).