Leaf-miner: The young larvae mine one or two needles. Later they live free in a communal web in which also much frass and remants of needles are stuck (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). The larva is illustrated in Bladmineerders van Europa.
Larvae of Dichomeris marginella on Juniperus
Image: Connecticut Agricultural Experiment
Station Archive (Bladmineerders van Europa)
Pupa: The pupae of moths have visible head appendages, wings and legs which lie in sheaths (see examples). See Patočka & Turčáni (2005a).
The adult is illustrated in UKMoths. The male
and female genitalia are illustrated by the Lepidoptera Dissection Group.
Hosts in Great Britain & Ireland: Currently unknown.
of year - larvae: Mining larvae in mid-summer; free living larvae till early summer of the following year (Freeman, 1967a) (Bladmineerders van Europa).
of year - adults: Flies at night in July and August, coming to light (UKMoths).
in Great Britain & Ireland: It occurs in suitable habitat in much of England, and in southern Ireland
recorded in the Republic of Ireland and Channel Islands (Karsholt and van Nieukerken
in Fauna Europaea).
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elsewhere: Widespread in continental Europe including Austria,
Belgium, Bulgaria, Corsica, Czech Republic, Danish
mainland, Dodecanese Is., Estonia, Finland, French mainland, Germany, Greek mainland, Hungary,
Italian mainland, Latvia, Lithuania, Luxembourg, Macedonia,
Poland, Romania, Russia - Central, East, and Northwest, Slovakia, Spanish mainland, Sweden,
Switzerland, The Netherlands and Ukraine (Karsholt and van Nieukerken
in Fauna Europaea).
NBN Interactive Grid Maps of known host species: Host species unknown.
British and Irish Parasitoids in Britain and elsewhere: Currently unknown.