Short, gradually widening, brown, corridor, 9-13 mm long and 0.5-2
mm wide. At he start of the mine a small lower-surface hole, lined
with silk, through which frass is ejected. The older larva lives
free in a spinning under the leaf or, even later, in a leaf that
is spun upwards into a pod (Bladmineerders van Europa).
The larva feeds on saw-wort, initially mining the leaf and later feeding on the upper cuticle, causing windows in the leaf (UKMoths).
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 young larva has a black head and prothoracic plate, a pale green
body with cocncolorous anal plate and darker dorsal line. See Harper
et al. (2002a) for a description of the free-living larva (Bladmineerders van Europa).
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: Currently unknown.
of year - adults: Currently unknown.
in Great Britain & Ireland: Britain including East Cornwall (VC2),
South Wiltshire and West Cornwall (NBN
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elsewhere: Russia East and East Palaearctic (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.