Leaf-mine: The mine is underside, small, seldom reaching midrib. The lower epidermis with several small creases, sometimes several larvae mine the same leaf (British leafminers).

Lower-surface tentiform mine between two side veins, often at quite some distance from the midrib. Lower surface with many folds, all very weak. Often several mines in one leaf. Pupa in a white cocoon in an angle of the mine, attached to the roof. The cocoon is free from frass; all frass is heaped in an angle of the mine, opposite to the cocoon (Bladmineerders van Europa).

Larva: The larva is illustrated in Bladmineerders van Europa.

Pupa: The cremaster is illustrated in British leafminers and 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: September - October (British leafminers).

Time of year - adults: The adults fly mostly in August, but the species may be bivoltine, with moths also recorded in May (UKMoths).

Distribution in Great Britain and Ireland: Widespread in Britain including Anglesey, Bedfordshire, Caernarvonshire, Cheshire, Denbighshire, Dorset, East Norfolk, East Suffolk, East Sutherland, Glamorgan, Herefordshire, Merionethshire, Middlesex, North Aberdeen, North Devon, North Essex, North Hampshire, North Somerset, North Wiltshire, Shropshire, South Aberdeen, South Essex, South Lancaster, South Wiltshire, South-west Yorkshire, Stafford, Surrey, West Gloucestershire, West Norfolk, West Suffolk 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 ((UKMoths).

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 Albania, Austria, Belarus, Belgium, Bulgaria, Croatia, Czech Republic, Danish mainland, Estonia, Finland, French mainland, Germany, Hungary, Italian mainland, Latvia, Lithuania, Luxembourg, Republic of Moldova, Norwegian mainland, Poland, Portuguese mainland, Romania, Russia - Central, Northwest and South, Sardinia, Slovakia, Sweden, Switzerland, The Netherlands, Ukraine and Yugoslavia. Also recorded in Near East (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.