Leaf-mine: A narrow linear mine which may largely fill small leaves and produce a secondary blotch (Spencer, 1976: 257).

Long, upper-surface, gradually widening, corridor, in the end often forming a secondary blotch. The corridor regularly crosses itself. Frass in irregular grains or short strings. Pupation outside the mine; exit slit in the lower epidermis (Bladmineerders van Europa).

Forms a narrow upper surface linear mine which may then form a secondary (British leafminers).

Larva: The larva is described by de Meijere (1925) and Dempewolf (2001: 145); posterior spiracles with 13-15 bulbs in a ellipse. The few living larvae I have seen of G. galiivora all were bright yellow, contrary to the whitish larvae of morio; if this is a reliable differentiating character remains to be seen (Bladmineerders van Europa).

Puparium: Orange; posterior spiracles each having an ellipse of 8-13 minute bulbs (Spencer, 1976: 257).

Comments: Galium mollugo is treated as Galium album (Hedge Bedstraw) by Stace (2010).

Hosts in Britain:

Hosts elsewhere:

Time of year - mines: September.

Time of year - adults: Unknown.

Distribution in Great Britain and Ireland: Widespread in Britain including Surrey (Great Humble), Buckinghamshire (Beaconsfield) (Spencer, 1972: 50), Warwickshire (Exhall) (Robbins, 1991: 105), East Gloucester (Snowshill) (British leafminers); Carmarthenshire, North Lincolnshire, Pembrokeshire, South-west Yorkshire and Stafford (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 Denmark, Finland, Norway, Sweden (Spencer, 1976: 257), The Netherlands (Bladmineerders van Europa), Germany (Spencer, 1976: 257; Dempewolf, 2001: 145), Corsica, Czech Republic, French mainland, Hungary, Poland and Romania (Martinez in Fauna Europaea).

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

Parasitoids in Britain and elsewhere:

Biodiversity Heritage Library
Bladmineerders van Europa
British leafminers
Encyclopedia of Life
Fauna Europaea [128268]
NBN Gateway