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Leaf-mine:
The mine in Luzula pilosa is rarely at the leaf-tip, being
usually about halfway down the leaf blade and well clear of the
winter/pring dieback. The autumn mine typically consists of a long
stright slended gallery folloowing one of the veims. The mine is
no wider than the larva and the frass is scattered towards or away
from the leaf-tip. In spring the mine is contined as a broad elongated
gallery with frass irregularly placed. Pupation occurs on the upper
surface of a leaf and is anchored by a silk girdle (Bland and
Knill-Jones, 1988).
From
autumn till early spring the larva makes a quite narrow corridor
with a total length of 12-16 cm, essentually running parallel to
the leaf venation; the corridor may change direction 2-3 times.
Generally the corridor lies about halfway the length of the leaf.
In March-April this gallery abruptly gives way to an elongate blotch,
that generally obliterates the original gallery. The larva may leave
its mine and restart elsewhere by making a lower-surface opening
in a new leaf, not far from the leaf-tip. Pupation external (Bladmineerders
van Europa).
Larva:
The larva has a black head and prothoracic plates with a pink body
and narrow creamy nid-dorsal line and a more diffuse creamy line
along the spiracles. The intensity of the pink varies considerably
(Bland and Knill-Jones, 1988).
Body more or less intensely pink, with three cream-coloured length lines; head and prothoracic plate black (Bladmineerders
van Europa).
Pupa:
See Patocka (1999a), Patocka and Turcáni (2005a) (Bladmineerders
van Europa).
Adult:
Not illustrated in UKMoths (check for update). The genitalia are not illustrated by the Lepidoptera
Dissection Group (check for update).
Hosts
in Britain:
Hosts
elsewhere:
Time
of year - larvae:
Autumn to April-June of the following year (Bladmineerders
van Europa).
Time
of year - adults: Unknown.
Distribution
in Great Britain and Ireland: Britain including East Norfolk,
East Ross, Forfar, Kincardine, North Devon and South Wiltshire (
NBN
Gateway, as Biselachista trapeziella - 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).
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,
Belgium, Czech Republic, Danish mainland, Finland, French mainland,
Germany, Italian mainland, Latvia, Norwegian mainland, Poland, Slovakia,
Sweden and Switzerland (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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