miner: Large, transparent, in fresh condition pale green blotch that begins
at the leaf margin, without an accumulation of frass. Mine and larva
are undistinguishable from those of S.
betuleti (Bladmineerders van Europa).
mine is also illustrated in 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 pale green, with a brown head (British
leafminers). The larva is also illustrated in Bladmineerders van Europa.
The pupae of sawflies have visible head appendages, wings and legs which lie in sheaths.
The adult is illustrated in ECatSym - Electronic World Catalog of Symphyta.
Hosts in Great Britain & Ireland:
of year - larvae: May - June (British
of year - adults: Currently unknown.
Full synonymy and references are listed in ECatSym - Electronic World Catalog of Symphyta.
in Great Britain & Ireland: A female was found in May 1942
in Ireland (Liston and O'Connor, 2005) and the species has subsequently
been recorded in mainland Britain (British
leafminers - Newsletter 12).
NBN Grid Map:
elsewhere: Widespread in continental Europe including Austria,
Belgium, Finland, Germany, Luxembourg and Sweden (van Achterberg
in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: