Callirhytis spec., sexual generation
on Quercus

Quercus cf. robur, France, dép. Ardennes, Mont Vireux © Sébastien Carbonnelle

Quercus robur, Belgium, prov, Hainaut, Mouscron, lieu-dit “Bois Fichaux” © Stéphane Claerebout

cut open

Quercus robur, Belgium, prov, Namur, Doische, Matagne-la-Grande, RN Hurées © Stéphane Claerebout: “gall”

opened
gall
Gall chambers under the bark on unchanged one-year twigs; only the eventual appearance of exit holes betrays their presence.
hostplants
Fahaceae, monophagous
Quercus petraea, robur.
notes
the galls of the sexual generation of Callirhytis erythrocephala, glandium, abd rufescens cannot be told apart.
Last modified 21.xii.2018