very clear blotch, without preceding corridor, usaally harbouring
several crimson marbled larvae. The mine mostly begins near the
base of the midrib. Most frass is ejected from the mine, but some
of the grains are trapped in a loose spinning below the leaf, that
has been made by the larvae during excursions. The larvae can leave
their mine and restart elsewhere (Bladmineerders van Europa).
large blotch mines. There may be several larvae in each blotch.
Frass is ejected from the mine and collects in a light web spun
beneath the mine. The larvae can change leaves to feed (British
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).
The larva is reddish brown, with whitish marbling. The larva overwinters
within a cocoon spun in the leaf (British
leafminers). The larvae hibernate individually in a discoid
cocoon (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: August - September (Bladmineerders van Europa).
of year - adults: Currently unknown.
in Great Britain & Ireland: Britain including Banffshire, Caernarvonshire,
Elgin and South Aberdeen (NBN
elsewhere: Widespread in continental Europe including Austria,
Belarus, Belgium, Bosnia and Herzegovina, Czech Republic, Estonia,
Finland, French mainland, Germany, Hungary, Italian mainland, Latvia,
Lithuania, Macedonia, Norwegian mainland, Poland, Russia - North
and Northwest, Slovakia, Sweden, Switzerland and The Netherlands
(Karsholt and van Nieukerken in Fauna Europaea).
NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere: Currently unknown.