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Leaf-mine: Early mines are spiral galleries; later forms pale blotches, sometimes
having moved to a different leaf (British
leafminers).
Egg
at the upperside of the leaf, not near the midrib. The larva starts
by making a long, narrow, full depth corridor that is strongly spiraled
or even lies in intestine-like loops. Frass as fine grains, distributed,
later in a central line. After a while a new mine is made, either
a continuation of the corridor or, more often, in a new leaf. This
new mine begins as a narrow corridor but soon widens into a large
blotch; here the fass lies in a broad band. The larva lies venter-upwards
in the mine. Pupation external (Bladmineerders
van Europa).
The
mine is also illustrated in UKMoths.
Larva:
Whitish; head light brown; propthoracic and anal shield yellowish brown (Koster, 2002b; Koster and Sinev, 2003a) (Bladmineerders van Europa).
Pupa:
Pupation in a cocoon, on a leaf or in leaf-litter (British
leafminers). See also See Patočka and Turčáni (2005a) (Bladmineerders van Europa).
Adult:
The adult is illustrated in UKMoths. The genitalia are not illustrated by the Lepidoptera
Dissection Group (check for update).
Hosts
in Britain:
Hosts elsewhere:
Time
of year - larvae: August-September (British
leafminers; UKMoths).
Time
of year - adults: A single generation flies in July and August
but is not easy to locate as an adult (UKMoths).
Distribution
in Great Britain and Ireland: A relatively local species occurring
in England and Wales, less common in the eastern counties (UKMoths)
including Cheshire, Derbyshire, Durham, East Cornwall, East Gloucestershire,
Glamorgan, Leicestershire, North Essex, North Hampshire, North Wiltshire,
Northumberland South, Shropshire, South Devon, South-west Yorkshire,
Stafford, Warwickshire and Worcestershire (NBN
Gateway - N.B. includes Watsonian Vice Counties having publicly
available records that fall within or overlap the vice county border
at 10km resolution or better i.e. a record for a vice county may relate to an adjacent vice county - for included datasets see NBN Grid map below). See also British
leafminers distribution map.
Also
recorded in the Republic of Ireland (Karsholt and van Nieukerken
in Fauna
Europaea).
NBN Grid map: Note that not all datasets on the NBN Gateway may be available on the map below. If you are an NBN Gateway registered user you can request access for missing datasets via the link 'Open interactive map in new window' below.
Distribution
elsewhere: Widespread in continental Europe including Austria,
Balearic Is., Belgium, Czech Republic, Danish mainland, Estonia,
Finland, French mainland, Germany, Hungary, Latvia, Lithuania, Poland,
Romania, Slovakia, Spanish mainland, Sweden, Switzerland and The
Netherlands (Karsholt and van Nieukerken in Fauna
Europaea).
NBN
interactive distribution map(s) of known host species in Great Britain
and Ireland and elsewhere:
Parasitoids
in Britain and elsewhere: Unknown.
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