Callirhytis spec., sexual generation

on Quercus

Callirhytis spec.: gall of the sexual generation on Quercus

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

Callirhytis spec.: exit hole in Quercus robur

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

Callirhytis spec.: exit hole in Quercus robur

cut open

Callirhytis spec.: 'gall' on Quercus robur

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

Callirhytis spec.:

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.

mod 21.xii.2018