narrow gallery with frass in thin central line. The moths must be
bred through to distinguish S.alnetella and S.glutinosae (British
at the leaf lower surface. Then a full depth slender, corridor,
often following a vein or the leaf margin for some distance. Frass
in a continuous central line that nowhere is wider than one third
of the corridor width. Frass never coiled. Usually only one mine
in a leaf. Pupation outside the mine (Bladmineerders van Europa).
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).
larva is a pale yellow laterally and white dorsally with the green
gut visible from above; head pale brown (British
head light brown; abdominal segment 1 ventrally spinulose (Gustafsson
and van Nieukerken, 1990a). Prosternum without a spot (which is
present in glutinosae )
(Bladmineerders van Europa).
Pupa: The pupae of moths have visible head appendages, wings and legs which lie in sheaths (see examples).
The adult is not illustrated in UKMoths (check for update). The genitalia are not illustrated by the Lepidoptera
Dissection Group (check for update).
Hosts in Great Britain & Ireland:
of year - larvae: July, September - October (British
of year - adults: Currently unknown.
in Great Britain & Ireland: Widespread in Britain including
Ayrshire (VC74), Bedfordshire (VC30), Caernarvonshire (VC49), Cambridgeshire (VC29), Carmarthenshire (VC44),
Cheshire (VC58), Derbyshire (VC57), East Gloucestershire (VC33), East Norfolk (VC27), East Suffolk (VC25),
Glamorganshire (VC41), Herefordshire (VC36), Hertfordshire (VC20), Huntingdonshire (VC31), Kincardineshire (VC91),
Monmouthshire (VC35), North Essex (VC19), North Hampshire (VC12), North Somerset (VC6), Shropshire (VC40),
South Aberdeenshire (VC92), South Lancashire (VC59), South Wiltshire (VC8), Staffordshire (VC39), West Norfolk (VC28), West Suffolk (VC26) and Worcestershire (VC37) (NBN
Gateway). Also Northen Ireland and the Republic of Ireland.
See also British
leafminers distribution map.
NBN Grid Map:
elsewhere: Widespread in continental Europe including Austria,
Belgium, Corsica, Croatia, Czech Republic, Danish mainland, Estonia,
Finland, French mainland, Germany, Hungary, Italian mainland, Lithuania,
Norwegian mainland, Poland, Portuguese mainland, Romania, Russia
- East, Sardinia, Slovakia, Slovenia, Spanish mainland, Sweden,
Switzerland, The Netherlands, Ukraine and Yugoslavia (Karsholt and
van Nieukerken in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: