Leaf-mine: The larvae feed mainly on Broad-leaved Willowherb mining the leaves (UKMoths).

Large full depth blotch in the lower leaves. Much frass in coarse grains. The larva easily leaves its mine and restart elsewhere. Pupation either in the mine or in the ground. Mines cannot be told apart from those of Mompha propinquella (Bladmineerders van Europa).

Larva: Body varying from yellowish pink to purple brown; head black with a light V-shaped marking. Prothoracic plate black, divided lengthwise; anal plate and feet dark grey (Koster, 2002b; Koster and Sinev, 2003a) (Bladmineerders van Europa).

Pupa: See Patocka and Turcáni (2005a) (Bladmineerders van Europa).

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

Hosts in Britain:

Hosts elsewhere:

Time of year - larvae: Unknown.

Time of year - adults: The moths are at large between May and July (UKMoths).

Distribution in Great Britain and Ireland: Distributed locally in England and Scotland (UKMoths) including Cambridgeshire, Carmarthenshire, Derbyshire, East Norfolk, East Suffolk, Glamorgan, Herefordshire, Kincardine, North Essex, North Somerset, North Wiltshire, Shropshire, South Devon, South Essex, South Hampshire, South Wiltshire, Stafford, West Kent, West Norfolk, West Suffolk and Worcestershire (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).

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, Czech Republic, Danish mainland, Estonia, Finland, French mainland, Germany, Hungary, Italian mainland, Kaliningrad Region, Latvia, Norwegian mainland, Poland, Romania, Russia - North and Northwest, Slovakia, Spanish mainland, Sweden, Switzerland 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.