Leaf-miner, seed / flower feeder: The larva starts to mine the leaves and then later feeds on flowers and seeds (British leafminers, as C. artemisiella).

Squat tubular silken case of 6-7 mm. The front half is covered with felt, the rear half is greyish with some darker length lines. The case is trivalved, the mouth angle is c. 15-30°. The larva not only lives on the leaves, but also feeds in the inflorescence (Bladmineerders van Europa).

Larva: The larval case is also illustrated in UKMoths.

Pupa: The larva leaves the food plant, when fully fed in September, and attaches its case low down on a stem. The case is trivalved and has longitudinal stripes (British leafminers,, as Coleophora artemisiella).

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

Hosts in Britain:

Hosts elsewhere:

Time of year - larvae: August - June (British leafminers, as Coleophora artemisiella).

Time of year - adults: July - August (UKMoths).

Distribution in Great Britain and Ireland: East Suffolk and North Essex (NBN Gateway, as C. artemisiella - 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). It can be found on the edges of salt marshes on the East coast (British leafminers, as Coleophora artemisiella).

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, Latvia, Lithuania, Norwegian mainland, Poland, Romania, Russia - South, Slovakia, Spanish mainland, Sweden, Switzerland, The Netherlands and Ukraine. Also recorded from 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.