Leaf-miner: Initially an epidermal mine on the upper surface of the leaf, later
the mine starts to contract and the leaf concealing the mine. Now
the larvae leave the mine and live freely in a downwards rolled
of Belgian Lepidoptera).
solitary in an elongate upper-surface epidermal (thence silvery)
mine. Frass initially in a rust-coloured central line. Later, when
the mine starts to contract and the leaf folds over the mine, the
frass is black and concentrated in a corner of the mine. At this
point the larva leaves the mine, and starts living freely in a downwards
rolled leaflet (Bladmineerders van Europa).
mine can be distinguished from that of G.syringella on the same plant as it is a silver colour whereas that of G.syringella is brownish (British
Larva: The larvae of moths have a head capsule and chewing mouthparts with opposable mandibles (see video of a gracillarid larva feeding), six thoracic legs and abdominal legs (see examples).
Emmet, Watkins and Wilson (1985a) write that the larva has a black
spot laterally on head and prothorax; that does not match with the
photo above (Bladmineerders van Europa).
Pupa: The pupae of moths have visible head appendages, wings and legs which lie in sheaths (see examples).
Pupation in a flimsy white cocoon, attached hammock-wise within
the final cone (Catalalogue
of Belgian Lepidoptera). Pupation in a white cocoon that is
attached to the leaf with fine threads (Bladmineerders van Europa).
The adult is illustrated in UKMoths. The male
and female genitalia are illustrated by the Lepidoptera Dissection Group.
Hosts in Great Britain & Ireland:
of year - larvae: July-September (British leafminers).
of year - adults: Currently unknown.
in Great Britain & Ireland: Britain & Ireland (Karsholt
and van Nieukerken in Fauna Europaea) including Derbyshire, East Gloucestershire, East Kent,
East Ross, Easterness, Glamorganshire, North Somerset, South Wiltshire,
Staffordshire, West Gloucestershire (VC34) and Westmorland (NBN
Atlas). See also British
leafminers distribution map.
recorded from the Republic of Ireland. See also Ireland's NBDC interactive map.
elsewhere: Widespread in continental Europe including Albania,
Austria, Belgium, Czech Republic, Danish mainland, Estonia, Finland,
French mainland, Germany, Hungary, Italian mainland, Latvia, Norwegian
mainland, Poland, Romania, Russia - Central, Northwest and South,
Sardinia, Slovakia, Sweden, Switzerland, The Netherlands, Ukraine
and Yugoslavia (Karsholt and van Nieukerken in Fauna Europaea).
NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere: