Plant Parasites of Europe

leafminers, galls and fungi

Andricus quercustozae

Andricus quercustozae (Bosc, 1792)

on Quercus, agamous generation

Andricus quercustozae: gall on Quercus robur

Quercus robur, France, dép. Landes, Moliets-et-Maa, 28.viii.2020 © Pierre Duhem

Andricus quercustozae: gall on Quercus robur

The central gall chamber with the quercustozae larva is surrounded by a circle of, unidentified, inquiline larven. The picture begs the question how the oviposition of the inquiline has been executed.

Andricus quercustozae

Quercus sp., North Macedonia, Lake Prespa, Otesevo, 29.vii.2019 ©
Cor Zonneveld

Andricus quercustozae: galls on Quercus faginea

Quercus faginea, Spain, Castilla-La Mancha, Parque Nacional de Cabañeros iv.2018 @ Sébastien Carbonelle

Andricus quercustozae: galls on Quercus faginea

massive occurrence

Andricus quercustozae: failed gall

failed gall

Andricus quercustozae: gall on Quercus sp.

Quercus sp., Croatia, prov. Istria, Labin © Quentin Hubert

Andricus quercustozae gall

Quercus suber, France, Gironde, route Bordeaux-Narbonne; leg Magali Guillot-Pingue © Jean-Yves Baugnée

Andricus quercustozae gall

Quercus infectoria, Greece, Lesvos © Ben van As – identification cf!

Andricus quercustozae transported galls

North Portugal, Praia do Camarido by the mouth of the river Minho, Caminha © Maria Fremlin: galls transported downstream; upon inspection (early May) a few live wasps


the gall develops from a bud on a second-year shoot. The base of the gall encloses the branch, causing old galls to remain for a long time on the tree. Young galls are ± red, 17-40 mm. The gall has, beyond the equator, an often coalescing crown of warts. There is an inner gal.

host plants

Fagaceae, monophagous

Quercus brantii, canariensis, cerris, coccifera, faginea, frainetto, hartwisiana, ilex, infectoria, lusitanica, macranthera, petraea, pubescens, pyrenaica, robur, suber, trojana, vulcanica.

distribution within Europe

PESI (2024).


Cynips quercustozae; Andricus, Cynips, kiefferi Cabrera, 1987).
The “Cynips kiefferi” Cabrera that is depicted and described by Houard, basing himself on a work by Kieffer, 1900, is a different species. It concerns a galling of an acorn, perhaps A. dentimitratus.


Like many other galls, these can be used by ants as an opportunity to create a nest; see for instance Crematogaster scutellaris.

very young galls

Andricus quercustozae: galls on Quercus robur

Quercus robur, Portugal, Pinhal do Camarido, Moledo © Filipe Mesquita: shoot with some very young galls

Andricus quercustozae: galls on Quercus robur

the very earliest beginning is a flat disk with marginal projections

Andricus quercustozae: galls on Quercus robur

somewhat older gall

Andricus quercustozae: galls on Quercus robur

the galls strongly vary in their speed of development


The sexual stage develops in cryptic bud galls.


Antov & Stojanova (2016a), Azmaz (2015a), Azmaz & Katilmiş (2017a), Bayrak (2019a), Bellmann (2012a), Blanes-Dalmau, Caballero-López & Pujade-Villar (2017a), Buhr (1965a), Cerasa (2015a), Chireceanu, Chiriloaie, Teodoru & Sivu (2015a), Dauphin & Aniotsbehere (1997a), Demirel, Tataroğlu & Katilmiş (2023a), Gómez, Hernández Nieves, Garrido Torres, ao (2006a), Hellrigl (2009a, 2010a, 2012a), Hellrigl & Bodur (2015a), Houard (1908a), Karaca & Katılmış (2020a), Katılmış & Kıyak (2008a), Kemal & Koçak (2010a), Kwast (2012a, 2014a), Melika & Bechtold (2001a), Melika (2006a, 2018a), Melika, Csóka & Pujade-Villar (2000a), Marković (2014a, 2015a), Mete & Demirsoy (2012a), Nieves-Aldrey (1983a, 1984b, 2001a), Nieves-Aldrey, Gómez, Hernández Nieves & Lobo (2006a), Pujade-Villar, Kwast, Thuroczy & Bellido (2002a), Pujade-Villar, Melika & Csóka (2000a), Schimitschek (1939a), Shachar, Melika, Inbar & Dorchin (2018a), Stojanova (2005a), Tavares (1905a), Tomasi (2012a, 2014a).

Last modified 2.i.2024