and case-bearer: The larva feeding on the leaves, and sometimes
the flowers. The leaves are blanched by the feeding and the species
often feeds gregariously, becoming a pest. The larval case is built
in a distinctive herringbone-like fashion, and is sometimes likened
to a spikelet of certain grasses (UKMoths).
case. Each lobe consists of a mined leaflet, that has been sliced
open at one side. The lobes are attached alternatively dorsally
and ventrally, resulting in a sharp dorsal and ventral keel. The
complete case strongly resembles a grass spikelet, like of Bromus.
Mouth angle 20-40° (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).
See Suire (1961a) and Emmet et al. (1996a) (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: September to October, feeding again from May
to June (British
of year - adults: June to August (UKMoths).
in Great Britain & Ireland: Britain including Bedfordshire (VC30),
Caernarvonshire (VC49), Denbighshire (VC50), East Kent (VC15), East Suffolk (VC25), East Sussex (VC14),
Glamorganshire (VC41), Merionethshire (VC48), South Aberdeenshire (VC92), Staffordshire (VC39), Surrey (VC17), West Cornwall (VC1), West Suffolk (VC26) and Worcestershire (VC37) (NBN
recorded hosts - Genista
anglica and Genista
pilosa - are not recorded in Ireland.
NBN Grid Map:
elsewhere: Widespread in continental Europe including Austria,
Belgium, Czech Republic, Danish mainland, French mainland, Germany,
Greek mainland, Hungary, Italian mainland, Macedonia, Portuguese
mainland, Romania, Sardinia, Slovakia, Spanish mainland, Sweden
and The Netherlands (Karsholt and van Nieukerken in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: