Last modified: Nov. 25, 2024, 12:24 p.m.
Only known from a single record, Belgium, NA, Rochefort, 1849, 1 specimen, leg. J. Colbeau. Probably extinct now.
Native
Ground colour is either brownish or greyish white, both forms without a real pattern but with a lot of darker scales all over the wing giving a mottled appearance. There exist also many mixed forms.
First instars make a narrow gallery on the underside of the leaf which later on widens into a blotch situated between two veins.
See also gracillariidae.net and bladmineerders.be.
A greyish green, transparant cocoon on the underside of a leaf.
Free-living instars at first feed under a folded leaf margin and then roll a leaf tip downwards. The caterpillars make two such rolls. They have a preference for fresh leaves. The species hibernate in the adult stage.
Two generations per year in May–June and July–August.
Mainly on Quercus ilex, but also observed on Quercus robur and Castanea sativa.