Leaf
miner: Large blotch, starting from the leaf margin. The very first triangular
part of the mine is filled with a dense mass of frass, caused by
lateral movements of the larva that actually press the frass in
this first mine segment. The mine seems full depth, but actually
is upper-surface, abeit very deep and (fresh) only very weakly greenish.
Pupation outside the mine (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 is intially green and then turns a dark yellow colour
towards maturity (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.
Adult:
The adult is illustrated in ECatSym - Electronic World Catalog of Symphyta.
Hosts in Great Britain and Ireland:
Hosts
elsewhere:
Time
of year - larvae: Summer and Autumn (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: Britain including Bedfordshire,
Berkshire, Buckinghamshire, Derbyshire, South Lancashire, South-east Yorkshire, Surrey, Warwickshire and West Suffolk (NBN
Atlas).
Also
recorded in the Republic of Ireland (Fauna Europaea).
Distribution
elsewhere: Widespread in continental Europe including Austria,
Belgium, Bulgaria, Czech Republic, Danish mainland, Finland, French
mainland, Germany, Luxembourg, Norwegian mainland, Poland, Romania,
Russia - Central, Sweden and The Netherlands (Fauna Europaea).
NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere:
Currently unknown.
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