Leaf-mine: Early mines are spiral galleries; later forms pale blotches, sometimes having moved to a different leaf (British leafminers).

Egg at the upperside of the leaf, not near the midrib. The larva starts by making a long, narrow, full depth corridor that is strongly spiraled or even lies in intestine-like loops. Frass as fine grains, distributed, later in a central line. After a while a new mine is made, either a continuation of the corridor or, more often, in a new leaf. This new mine begins as a narrow corridor but soon widens into a large blotch; here the fass lies in a broad band. The larva lies venter-upwards in the mine. Pupation external (Bladmineerders van Europa).

The mine is also illustrated in UKMoths.

Larva: Whitish; head light brown; propthoracic and anal shield yellowish brown (Koster, 2002b; Koster and Sinev, 2003a) (Bladmineerders van Europa).

Pupa: Pupation in a cocoon, on a leaf or in leaf-litter (British leafminers). See also See Patočka and Turčáni (2005a) (Bladmineerders van Europa).

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

Hosts in Britain:

Hosts elsewhere:

Time of year - larvae: August-September (British leafminers; UKMoths).

Time of year - adults: A single generation flies in July and August but is not easy to locate as an adult (UKMoths).

Distribution in Great Britain and Ireland: A relatively local species occurring in England and Wales, less common in the eastern counties (UKMoths) including Cheshire, Derbyshire, Durham, East Cornwall, East Gloucestershire, Glamorgan, Leicestershire, North Essex, North Hampshire, North Wiltshire, Northumberland South, Shropshire, South Devon, South-west Yorkshire, Stafford, Warwickshire and Worcestershire (NBN Gateway - N.B. includes Watsonian Vice Counties having publicly available records that fall within or overlap the vice county border at 10km resolution or better i.e. a record for a vice county may relate to an adjacent vice county - for included datasets see NBN Grid map below). See also British leafminers distribution map.

Also recorded in the Republic of Ireland (Karsholt and van Nieukerken in Fauna Europaea).

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, Balearic Is., Belgium, Czech Republic, Danish mainland, Estonia, Finland, French mainland, Germany, Hungary, Latvia, Lithuania, Poland, Romania, Slovakia, Spanish mainland, 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.