A strongly contracted upper-surface tentiform mine, generally in
the lower third of the leaf, beginning at the leaf base. Often a
second or third mine is made, starting from the leaf tip. These
secondary mines begin as a narrow, almost completely frass-filled
corridor, that continues down to the leaf base.al the while widening
into a tentiform mine. Pupation outside the mine (Steuer, 1980a)
(Bladmineerders van Europa).
found in plants in open or semi-shade (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).
Head pale honey coloured, mouth-parts dark brown; prothoracic and
anal plates and thoracic legs translucent yellowish green; body
dull green, tinged yellowish ventrally (Langmaid, 2007a). Steuer
(1980a) gives a detailed description, but it is not quite certain
that this indeed refers to tengstromi (Bladmineerders van Europa).
Pupa: The pupae of moths have visible head appendages, wings and legs which lie in sheaths (see examples).
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: Larvae overwinter in mines, which slowly develop
to June (British
of year - adults: Currently unknown.
in Great Britain & Ireland: Britain including Kent, Hampshire,
Oxfordshire (VC23), Monmouthshire and Elgin (British
NBN Grid Map:
Distribution elsewhere: Widespread in continental Europe including Austria, Danish mainland,
Estonia, Finland, Germany, Latvia, Norwegian mainland, Poland, Russia
- North and Northwest, Sweden and Switzerland (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.