and case-bearer: Lobe case. The full grown case is about 7 mm long. The mouth angle
is 0°, causing the case to lie flat on the leaf. The case is
gradually enlarged by the addition of rings that are cut out of
the epidermis. The rings become gradually larger, and stick irregularly
out of the contour of the case. The rings are cut out of the lower
epidermis of the mine. This implies that mines may have both normal,
small openings, and large ones. Compare for instance C.
violacea, that cuts rings out of the upper epidermis (Bladmineerders van Europa).
larva feeds briefly intially and again after over wintering. It
then aestivates until Autumn. It makes one case which it enlarges
by adding pieces of excised lower epidermis (British
Larva: The larvae of moths have a head capsule and chewing mouthparts with opposable mandibles (see video of a gracillarid larva feeding), six thoracic legs and abdominal legs (see examples).
The larva is illustrated in Bladmineerders van Europa.
Pupa: The pupae of moths have visible head appendages, wings and legs which lie in sheaths (see examples).
The adult is illustrated in UKMoths. The genitalia are not illustrated by the Lepidoptera
Dissection Group (check for update).
Hosts in Great Britain & Ireland:
of year - larvae:
Biennial in the UK - August - September and May - June (British
leafminers). Full grown cases already in autumn. In Britain
the larva lives two years; if this also applies to the Continent
is not known (Bladmineerders van Europa).
of year - adults: Currently unknown.
in Great Britain & Ireland: Britain including East Norfolk (VC27),
East Suffolk (VC25), North Hampshire (VC12), North Somerset and South Wiltshire (VC8),
NBN Grid Map:
elsewhere: Widespread in continental Europe including Austria,
Belgium, Czech Republic, Danish mainland, Estonia, Finland, French
mainland, Germany, Hungary, Italian mainland, Latvia, Lithuania,
Norwegian mainland, Poland, Portuguese mainland, Romania, Slovakia,
Sweden, Switzerland and The Netherlands (Karsholt and van Nieukerken
in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: