Mine of Pegomya steini on Cirsium vulgare Image: Willem Ellis (Bladmineerders van Europa)

Leaf-mine: Large, very transparent blotch, with primary and secundary feeding lines. In the centre a concentration of black frass. Mines can coalesce, and then contain several larvae. At the start of the mine, at the leaf underside, a white egg shell. However, the larva can leave its mine and restart elsewehere, therefore mines without an egg shell may occur as well (Bladmineerders van Europa).

Larva: The larva is described by Vos-de Wilde (1935) and illustrated in Bladmineerders van Europa.

Puparium: Details unknown.

Comments: Ackland in Chandler (1978) did not indicate whether his host records were British or Foreign and are therefore included under 'Hosts in Britain' and 'Hosts elsewhere

Hosts in Britain:

Hosts elsewhere:

Time of year - mines: July.

Time of year - adults: Unknown.

Distribution in Great Britain and Ireland: Recorded in Britain by Ackland (1978); Cambridgeshire, East Kent, Elgin and Surrey (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 continental Europe including The Netherlands (Bladmineerders van Europa), Austria, ? Bulgaria, Czech Republic, Denmark, Finland, French mainland, Germany, Lithuania, Norwegian mainland, Poland, Slovakia and Sweden (Michelsen, 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.