Leaf-mine: Lower-surface, yellow-green tentiform mine, 20-32 mm long, with a number of fine folds in the lower epidermis. In most cases the mine is elongate, situated between two lateral veins. The reddish to chestnut brown pupa lies in a flimsy cocoon in which no frass is incorporated: the frass is stored not in a clump but in a row of loose grains behind the cocoon. Just before edcysis the pupa works itself out of the mine through the lower wall; mostly the empty exuvium sticks halfway out of the mine (Bladmineerders van Europa).

Larva: Details unknown.

Pupa: Cremaster, similar to that of Ph. anceps, with two pairs of short, stout spines, the outer one curved outwards, the inner one inward; the outer spines about as long as wide at their base (Gregor and Patocka, 2001a; Triberti, 2007a) (Bladmineerders van Europa).

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

Hosts in Britain:

Hosts elsewhere:

Time of year - larvae: July, September - November (British leafminers).

Time of year - adults: Unknown.

Distribution in Great Britain and Ireland: Britain including Cambridgeshire, East Kent, East Suffolk, Herefordshire, Huntingdonshire, South Wiltshire, Surrey, West Gloucestershire, West Lancaster, West Norfolk, West Suffolk, Westmorland and Worcestershire r (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, French mainland, Germany, Hungary, Italian mainland, Madeira, Poland, Romania, Russia - South, Sardinia, Sicily, Slovakia, Spanish mainland, Switzerland, The Netherlands and Ukraine. Also recorded in Near East and Nearctic region (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.