Leaf-mine: A 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).

Makes 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 leafminers).

Larva: 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: Details unknown.

Adult: Not illustrated in UKMoths (check for update). The genitalia are not illustrated by the Lepidoptera Dissection Group (check for update).

Hosts in Britain:

Hosts elsewhere:

Time of year - larvae: August - September (Bladmineerders van Europa).

Time of year - adults: Unknown.

Distribution in Great Britain and Ireland: Britain including Banff, Caernarvonshire, Elgin and South Aberdeen (NBN Gateway, includes Watsonian Vice Counties having records that fall within or overlap the vice county border at 10km resolution or better).

NBN Grid map: Note that not all datasets on the NBN Gateway may be available on the map below. If you are an NBN Gateway registered user you can request access for missing datasets via the link 'Open interactive map in new window' below.

Distribution 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 interactive distribution map(s) of known host species in Great Britain and Ireland and elsewhere:

Parasitoids in Britain and elsewhere: Unknown.