blotch mine is formed with a small area of browning of the leaf
around the egg (British
upper-surface, oval blotch without a preceding gallery, with clear
amounts of greenish frass. Sometimes more than one mine in a leaflet,
that can merge. Pupation outside the mine (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).Widest in the metathorax; segment limits deeply constricted. Head
shining pale yellow (darker in earlier instars), mouth parts light
brown. Prothoracic plate divided, obscure, with a pair of darkened
spots anteriorly. Thoracic feet small, shining pale yellow like
the body (Emmet, 1985a) (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: August.
of year - adults: Currently unknown.
in Great Britain & Ireland: Britain including Isle Of Wight
and South Devon (NBN
Gateway) and Harlech, Merionethshire. A very local mainly coastal
species, tending to be confined to cliffs and undercliffs (British
leafminers). See also British
leafminers distribution map.
recorded in the Republic of Ireland (Karsholt and van Nieukerken
in Fauna Europaea).
NBN Grid Map:
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elsewhere: Northwest Europe including Estonia, Finland, Latvia,
Norwegian mainland 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.