So far an uncommon species in Belgium.
The shiny round egg is laid on the underside (contrary to the other Quercus feeding Ectoedemia's) on Quercus.
The monophagous larva creates a twisted gallery and ends rarely in a
second blotch. The feeding causes a green island in the autumn and
mines can be often be found in fallen leaves. Pupation outside the mine
in a yellowish brown cocoon.
adults fly in one generation a year during June and July. Can be found resting during the day on oak trunks.
Limburg, Engsbergen, 16 October 2008.
mine (variation) on underside of Quercus
with egg visible
determination by W. N. Ellis
(Photo © Frank Van de Meutter)