Leaf-mine: Initially in short gallery becoming a brownish blotch near the leaf margin. Later in two or three Parornix-like folds at the edge of the leaf (British leafminers).

Small (up to 10 mm long), lower-surface blotch near the leaf margin, with a brownish lower epidermis. The mine in fact is a tentiform mine, but so little silk is produced that the blotch hardly contracts at all. The mine is preceded by a quite short corridor, that is overrun by the later blotch. The older larva leaves its mine and starts feeding under a flap of the leaf margin that is folded down and fixed with silk on the blade underside. Two or three such folds are made, not necessarily on the same leaf. The fact that no leaf rolls are made, but parts of the leaf are folded down rather makes one think of the work of a Parornix (Bladmineerders van Europa).

Larva: Whitish with pale brown head (Bladmineerders van Europa).

Pupa: Under a turned over leaf edge (British leafminers).

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

Hosts in Britain:

Hosts elsewhere:

Time of year - larvae: July - August (British leafminers).

Time of year - adults: Unknown.

Distribution in Great Britain and Ireland: Britain including Hampshire (Fleet, Portsmouth and Emsworth) (British leafminers); Bedfordshire, East Suffolk, Herefordshire, South Hampshire, Surrey, West Kent and West Suffolk (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, Belgium, Croatia, Cyprus, Czech Republic, Danish mainland, Estonia, Finland, French mainland, Germany, Hungary, Italian mainland, Latvia, Lithuania, Luxembourg, Norwegian mainland, Poland, Portuguese mainland, Romania, Russia - Central, Northwest and South, Sardinia, Slovakia, Sweden, Switzerland, The Netherlands and Ukraine (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.