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Leaf-mine:
The initial mine is a blotch type. It then leaves this and makes
folds on the leaf edge. The mine looks similar to Parornix
finitimella and the larvae should be examined for identification
of the mine. D. torquilella has legs concolorous with the
body, whereas P. finitimella has black ringed legs (British
leafminers, as Deltaornix torquillella).
Larva:
Details unknown.
Pupa:
In
cocoon under the folded edge of leaf (British
leafminers, as Deltaornix torquillella).
Hosts
in Britain:
Hosts
elsewhere:
Time
of year - mines: July to September (British
leafminers, as Deltaornix torquillella).
Time
of year - adults: The moths fly from May to July, and sometimes
are attracted to light (UKMoths,
as Deltaornix torquillella).
Distribution
in Britain: British Is. and Northern Ireland (Karsholt &
van Nieukerken in Fauna
Europaea) including East Kent, East Perth, Hunts, Lanark, North
Aberdeen, North Essex, North Hants, South Hants, South Lancaster
and South Wilts (NBN
Gateway distribution map - BRERC,
GiGL, JNCC,
NE,
NESBRC,
SNH and SHWRG).
See also British
leafminers distribution map (as Deltaornix
torquillella).
Also
recorded in the Republic of Ireland (Karsholt & van Nieukerken
in Fauna
Europaea).
Distribution
elsewhere: Widespread in Europe including Austria, Belarus,
Belgium, Corsica, Czech Republic, Danish mainland, French mainland,
Germany, Greek mainland, Hungary, Italian mainland, Macedonia, Republic
of Moldova, Norwegian mainland, Poland, Portuguese mainland, Romania,
Russia - Central and South, Sicily, Slovakia, Sweden, Switzerland,
The Netherlands and Ukraine (Karsholt & van Nieukerken in Fauna
Europaea).
Also
recorded in the Near East (Karsholt & van Nieukerken in Fauna
Europaea).
Parasitoids:
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