Initially the larva mines the leaflet, leaving a central line of
black frass, then grazes the leaflet tips externally, causing withering
young larva mines a fine leaf segment completely out, leaving a
black, central frass line. Older larvae live free on the the upperside
of the leaves, causing window feeding (Bladmineerders van Europa).
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).
Head and feet yellowish brown; body olive green with three length
rows of whitish pinacula (Bladmineerders van Europa).
Pupa: The pupae of moths have visible head appendages, wings and legs which lie in sheaths (see examples).
Larva pupates in an white ribbed cocoon (Bladmineerders van Europa).
The adult is not illustrated in UKMoths (check for update). The genitalia are not illustrated by the Lepidoptera
Dissection Group (check for update).
Hosts in Great Britain & Ireland:
of year - larvae: June - July (British
of year - adults: Currently unknown.
in Great Britain & Ireland: Widespread in Britain including
Easterness (VC96), Leicestershire (VC55), South Aberdeenshire (VC92), Stafford and Warwickshire
Gateway). First found in Aviemore in 1966. It is fairly common
on the riverbanks and verges in the Highlands (British
leafminers). See also British
leafminers distribution map.
NBN Grid Map:
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elsewhere: Widespread in continental Europe including Finland,
French mainland, Germany, Latvia, Norwegian mainland, Poland, Slovakia
and Sweden (Karsholt and van Nieukerken in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: Currently unknown.