Leaf
miner: Blotch, starting in the centre of the leaf. An ill-defined accumulation
of frass in its first part. The blotch develops with little consideration
of the major veins. Several mines may occur in a leaf, and coalesce
into one large blister (Bladmineerders van Europa).
The
mine is also illustrated in British
leafminers.
Larva:
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 has short feet and dark markings on the prosternum and
two spots on the meso- and meta-sternum (British
leafminers). The larva is also illustrated in (Bladmineerders van Europa).
Pupa:
The pupae of sawflies have visible head appendages, wings and legs which lie in sheaths.
Outside the mine (British
leafminers).
Adult:
Details unknown.
Hosts in Great Britain and Ireland:
Hosts
elsewhere:
Time
of year - larvae: Late summer (British
leafminers).
Time
of year - adults: Currently unknown.
Comments:
Full synonymy and references are listed in ECatSym - Electronic World Catalog of Symphyta.
Distribution
in Great Britain and Ireland: Hants (Fleet) (British
leafminers); West Suffolk (NBN
Atlas).
Distribution
elsewhere: Widespread in continental Europe including Bulgaria,
Czech Republic, Estonia, Finland, French mainland, Germany, Italian
mainland, Poland, Romania, Russia - Central, Sweden and The Netherlands
(Fauna Europaea).
Also
recorded in the Nearctic Region (Fauna Europaea).
NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere:
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