A somewhat inflated full depth blotch, that begins at the leaf margin.
The oviposition causes the leaf to roll inwords, covering (and hiding)
the mines. Often several mines in a leaf. Mainly in suckers (Bladmineerders van Europa).
Larva makes large blotch mines, which cause the leaves to curl over. Two mines are illustrated. The rolls brown as the mine ages (British
The larvae of sawflies have a head capsule, chewing mouthparts with opposable mandibles, six thoracic legs and abdominal legs (although they may be reduced) (see examples).
The larva is illustrated in British
The pupae of sawflies have visible head appendages, wings and legs which lie in sheaths.
Hosts in Great Britain & Ireland:
of year - larvae: Summer (British
of year - adults: Currently unknown.
Full synonymy and references are listed in ECatSym - Electronic World Catalog of Symphyta.
in Great Britain & Ireland: A local and scarce miner (British
leafminers); including North Wiltshire (VC7), Northamptonshire (VC32), Surrey (VC17),
West Lancaster and Westmorland (NBN
NBN Grid Map:
elsewhere: Widespread in continental Europe including Austria,
Belgium, Bulgaria, Czech Republic, Estonia, Finland, French mainland,
Hungary, Italian mainland, Poland, Romania, Slovakia, Sweden, Switzerland,
Switzerland and The Netherlands (van Achterberg in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: