Leaf-miner: The mine is rounded, between veins. The lower epidermis with several
small creases. The leaf may fold downwards if mine is at margin
mine begins as an inconspicuous lower surface epidermal corridor,
beginning at an iridescent egg shell. This corridor is followed,
and mostly replaced, by a relatively small, lower-surface, tentiform
mine with many weak folds. When the mine happens to lie close to
the leaf margin the leaf may fold downwards over the mine. Pupa
in the mine, dark brown - black, in a loosely spun cocoon. Frass
accumulated in a corner of 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).
The larva is illustrated in Bladmineerders van Europa.
Pupa: The pupae of moths have visible head appendages, wings and legs which lie in sheaths (see examples).
The pupa is illustrated in Bladmineerders van Europa.
The adult is illustrated in UKMoths.
genitalia, but not the female genitalia (check for update), are illustrated by the Lepidoptera Dissection Group.
Buhr (1935a) additionally mentions Acer saccharinum (Bladmineerders van Europa) as a host plant.
Hosts in Great Britain & Ireland:
of year - larvae: July, October (British
of year - adults: The moths are on the wing in May and August,
and can be found resting on the trunks of sycamore, but being so
small are difficult to find (UKMoths).
in Great Britain & Ireland: Widespread in Britain including
Ayrshire (VC74), Banffshire (VC94), Bedfordshire (VC30), Buckinghamshire (VC24), Caernarvonshire (VC49),
Cambridgeshire (VC29), Cheshire (VC58), Denbighshire (VC50), Derbyshire (VC57), East Kent (VC15), East Norfolk (VC27), East Suffolk (VC25), Elgin, Flintshire (VC51), Glamorganshire (VC41), Herefordshire (VC36), Hertfordshire (VC20), Huntingdonshire (VC31), Kincardineshire (VC91), Merionethshire (VC48), Middlesex (VC21),
Monmouthshire (VC35), North Aberdeenshire (VC93), North Devon (VC4), North Essex (VC19), North Hampshire (VC12),
North Somerset (VC6), North Wiltshire (VC7), North-west Yorkshire (VC65), Shropshire (VC40),
South Aberdeenshire (VC92), South Devon (VC3), South Essex (VC18), South Hampshire (VC11), South Lancashire (VC59), South Wiltshire (VC8), South-west Yorkshire (VC63), Staffordshire (VC39), Surrey (VC17),
West Gloucestershire (VC34), West Kent (VC16), West Lancashire (VC60), West Norfolk (VC28), West Suffolk (VC26), Westmorland (VC69) and Worcestershire (VC37) (NBN
See also British
leafminers distribution map.
Also recorded in the Republic of Ireland and Northern Ireland (Ireland's NBDC interactive map).
NBN Grid Map:
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elsewhere: Widespread in continental Europe including Austria,
Belgium, Bulgaria, Croatia, Czech Republic, Danish mainland, French
mainland, Germany, Hungary, Italian mainland, Latvia, Lithuania,
Poland, Romania, Russia - South, Slovakia, Sweden, Switzerland,
The Netherlands and Ukraine (Karsholt and van Nieukerken in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: