Leaf-miner: A short, twisting irregular gallery with frass filling two-thirds of its width. In exposed leaves the frass is densely packed, whereas in shaded leaves it is thinner (British
leafminers). It usually forms distinct dark brown mines, darker than S. aurella and the gallery edges are more conspicuously purple.
on the leaf upperside. The mine is an unusually short, not very
tortuous corridor with a central line of frass that is irregularly
interrupted and takes about 2/3 of the corridor width. Pupation
external (Bladmineerders van Europa).
Mine of Stigmella auromarginella on Rubus fructicosus agg.
Image: © Tony Davis (British
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 of auromarginellais amber yellow, head very light brown. The characteristic pattern
of spinulation is depicted by Gustafsson and van Nieukerken (1990a)
(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: Throughout the year (British
of year - adults: Currently unknown.
in Great Britain & Ireland: Britain including Dorset and
South Wiltshire (NBN
Gateway).See also British
leafminers distribution map.
recorded in the Republic of Ireland (Karsholt and van Nieukerken
in Fauna Europaea). See also Ireland's NBDC interactive map.
NBN Grid Map:
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elsewhere: Widespread in continental Europe including Crete,
Croatia, Cyprus, Danish mainland, French mainland, Portuguese mainland
and Sweden (Karsholt and van Nieukerken in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: