Samara-miner: In wing of samara, mines into the seed with a short gallery (British
egg of the first generation is deposited on the wing of a key. The
larva makes a short, superficial corridor (sometimes only the egg
is visible), leading towards the seed, that finally is eaten out.
Infested samaras are prematurely shed, and should be sought on the
ground. The larva of the second generation makes a short mine in
the bark of a petiole, and from there penetrates a bud that is consumed
from the inside out (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).
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 male
and female genitalia are illustrated by the Lepidoptera Dissection Group.
Comments: Records of Ectoedemia sericopeza on Field Maple (Acer campestre) require confirmation.
Hosts in Great Britain & Ireland:
of year - larvae: June, September - May (British
of year - adults: Currently unknown.
in Great Britain & Ireland: Widespread in England including
Bedfordshire (VC30), East Suffolk (VC25), North Essex (VC19), South Lancaster and West Suffolk (VC26) (NBN
See also British
leafminers distribution map.
NBN Grid Map:
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elsewhere: Widespread in continental Europe including Austria,
Belarus, Belgium, Croatia, Czech Republic, Danish mainland, Estonia,
Finland, French mainland, Hungary, Italian mainland, Latvia, Lithuania,
Norwegian mainland, Poland, Romania, Russia - Central, and Northwest,
Slovakia, Slovenia, Sweden, Switzerland, The Netherlands and Ukraine
(Karsholt and van Nieukerken in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: