Leaf-mine: The initial mine is in the leaf petiole and later the mines form green islands in the leaf (British leafminers).

Oviposition in the petiole, c. a cm below the base of the leaf. The larva begins its life as a borer in the petiole, causing it to locally swell somewhat. Once the larva has reached the leaf disc it begins forming an elongate blotch between the leaf margin and the most lateral vein, or, more rarely, between the midrib and the first lateral vein. Frass in two stripes, parallel to the sides of the mine. Pupation external. The larvae feed only at night, retreating within the petiole at daytime. The larva can be lured into the mine by keeping the leaf in the dark for a while (Borkowski, 1969a). The arrangement of the frass in two stripes is the result of the regular movement of the larva (Bladmineerders van Europa).

Larva: Light yellow, no ventral plates; see Gustafsson and van Nieukerken (1990a) for a description (Bladmineerders van Europa)

Pupa: Details unknown.

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

Hosts in Britain:

Hosts elsewhere:

Time of year - larvae: September - November (British leafminers).

Time of year - adults: Unknown.

Distribution in Great Britain and Ireland: South-east England including Ipswitch (British leafminers); Bedfordshire (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.

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, Belgium, Bulgaria, Croatia, Czech Republic, Danish mainland, Germany, Hungary, Italian mainland, Latvia, Lithuania, Poland, Romania, Russia - Central and South, Slovakia, Slovenia, Spanish mainland, Sweden, Switzerland, The Netherlands and Yugoslavia. Also recorded in the East Palaearctic and 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.