Leaf-miner and case-bearer: Larva mines leaves. The case is enlarged several times by mining a leaf-edge and inserting the existing case into the mine which is joined with silk. The final case is 7-8 mm long (British leafminers).

Larva in a composite leaf case, composed of large leaf fragments. Characteristically, the leaf fragments are attached in a failry untidy way. In spring the case has two colours, because the old material (dull yellowish, grey or pink) dates from before the hibernation, while new, reddish brown material dates from after the winter. The case finally is about 7-8 mm long; the mouth angle is 40-45°. (Bladmineerders van Europa).

Larva: Details unknown.

Pupa: Details unknown.

Adult: The adult is illustrated in UKMoths by Rob Edmunds. The male and female genitalia are illustrated by the Lepidoptera Dissection Group.

Hosts in Britain:

Hosts elsewhere:

Time of year - larvae: September to October, feeding again in April and May (British leafminers).

Time of year - adults: June or July (UKMoths).

Distribution in Great Britain and Ireland: Widespread in woodland where the foodplants are found (UKMoths) including Bedfordshire, Cambridgeshire, East Norfolk, East Suffolk, Glamorgan, Herefordshire, Isle Of Wight, Monmouthshire, North Somerset, Northamptonshire, South Hampshire, South Wiltshire, Surrey, West Gloucestershire, 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).

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, Belgium, Czech Republic, Danish mainland, Estonia, Finland, French mainland, Germany, Hungary, Italian mainland, Latvia, Lithuania, Norwegian mainland, Poland, Portuguese mainland, Romania, Slovakia, Slovenia, 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.