Leaf-mine: Starts as a contorted frass-filled gallery, between the midrib and vein. Later the gallery, with broken black frass, follows a vein before turning away. The final mine is 11-15 mm long. (British leafminers).

Oviposition on the leaf underside, generally in the axil of the midrib and a thick lateral vein. The very first part of the mine is so strongly contorted that sometimes a tiny secondary blotch originates, filled with black frass. Then follows a straight corridor of maximally 15 mm, almost completely filled with frass, mostly closely following a vein. Just before the larva is about to leave the mine (through an exit hole in the leaf underside) it turns away from the vein (Bladmineerders van Europa).

Larva: Dull, transparent yellowish; older larvae live free at the leaf underside, eating out windows (Bladmineerders van Europa).

The larva is also illustrated in British leafminers.

Pupa: Dark blackish brown, in a grey-black, ribbed cocoon (Langmaid, Porter and Collins, 2007) (Bladmineerders van Europa).

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: June, October (British leafminers).

Time of year - adults: Unknown.

Distribution in Great Britain and Ireland: Discovered in 2006 in Surrey (Farnham) (British leafminers).

NBN Grid map:

Distribution elsewhere: Widespread in continental Europe including The Netherlands, Germany (Bladmineerders van Europa), Austria, Czech Republic, Hungary, Italian mainland, Macedonia, Poland, Romania, Russia - Central and South, Sardinia, ? Sicily, Slovakia and Yugoslavia (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.