A group of four to six leaves are completely mined out from the
base on. The leaves have a hole near their base; these entrances
may be connected by a silken tube. Between the leaves a loose spinning.
All frass is ejected. Mines preferably occur when a tree has been
weakened by weather conditions or insect pest damage (Bladmineerders van Europa).
Larva: The larvae of moths have a head capsule and chewing mouthparts with opposable mandibles (see video of a gracillarid larva feeding), six thoracic legs and abdominal legs (see examples).
Orange brown, straw coloured to brick red with light brown head;
much darker during the winter rest. Pronotum darker, with lighter
anterior border (Bladmineerders van Europa).
Pupa: The pupae of moths have visible head appendages, wings and legs which lie in sheaths (see examples).
The adult is not illustrated in UKMoths (check for update). The genitalia are not illustrated by the Lepidoptera
Dissection Group (check for update).
Hosts in Great Britain & Ireland:
of year - larvae: September until end-May (Bladmineerders van Europa)
of year - adults: Currently unknown.
in Great Britain & Ireland: Britain (Karsholt and van Nieukerken in Fauna Europaea).
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Distribution elsewhere: Widespread in continental Europe including Austria, Czech Republic,
French mainland, Germany, Hungary, Italian mainland and Slovakia
(Karsholt and van Nieukerken in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: