Leaf-mine: A long, winding leaf-mine on the upper surface of the leaf, with frass widely-spaced in conspicuous black lumps. Pupation internal, at the end of mine (Spencer, 1972: 28 (fig. 68), 29).

Mines on Sonchus and Taraxacum are illustrated in British leafminers and on Solidago in Bladmineerders van Europa.

Larva: The larva is described Sasakawa (1961).

Puparium: Black or whitish-grey; posterior spiracles asymmetrical, each have two distinct arms, with 4 bulbs on one arm and 7 bulbs on the other (Spencer, 1972: 29).

Hosts in Britain:

Hosts elsewhere:

Time of year - mines: June, August-September.

Time of year - adults: Unknown.

Distribution in Great Britain and Ireland: Britain including Kent (Darenth and Ham Street), Derby (Miller's Dale) (Spencer, 1972: 29), Warwickshire (Robbins, 1991: 112); East Kent and East Sussex
(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).

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 much of Europe including Denmark, Finland, Sweden (Spencer, 1976: 69), The Netherlands, Luxembourg (Bladmineerders van Europa), Belgium (de Bruyn and von Tschirnhaus, 1991), Canary Is., Czech Republic, Germany, Italian mainland, Lithuania, Poland, Sicily, Spanish mainland and Yugoslavia (Martinez in Fauna Europaea).

Also recorded in Japan, Canada and the U.S.A. (Spencer, 1976: 69).

NBN interactive distribution map(s) of known host species in Great Britain and Ireland and elsewhere:

Parasitoids in Britain and elsewhere: