Leaf-miner: The early gallery is filled with frass, later leaving clear
Like Stigmella microtheriella the larva feeds on hazel or hornbeam, and its mines are often found
alongside that species in the same leaf. However the mines of S.
floslactella are generally wider, less angular and contain more
scattered frass than those of S. microtheriella (UKMoths).
at the underside of the leaf, in a vein axil. Mine a slender, gradually
widening corridor; the last section is clearly wider than the larva.
In the first section the vaguely delimited frass line almost fills
the corridor. Later the frass lies in irregular arcs and clouds,
filling about one third of the width of the corridor. The trajectory
of the mine is not angular, independent of the leaf venation. Pupation
external, exit slit in the upper epidermis (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 a dull yellow, head pale brown (British
greenish to pale yellowish; see also Gustafsson and van Nieukerken
(1990a) for a description. Contary to microtheriella the metanotum has a broad zone of fine spinules (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 by Rob Edmunds.
and female genitalia are illustrated by the Lepidoptera Dissection Group.
Hosts in Great Britain & Ireland:
of year - larvae: June - July, September - October (British
of year - adults: There are two generations, with adults on
the wing in May and August (UKMoths).
in Great Britain & Ireland: A widespread and fairly common
species across most of the British Isles (UKMoths)
including Banffshire (VC94), Bedfordshire (VC30), Breconshire (VC42), Buckinghamshire (VC24), Caernarvonshire (VC49),
Cambridgeshire (VC29), Cheshire (VC58), Denbighshire (VC50), Derbyshire (VC57), East Kent (VC15), East Norfolk (VC27), East Ross (VC106), East Suffolk (VC25), East Sutherland (VC107), Glamorganshire (VC41), Herefordshire (VC36), Hertfordshire (VC20), Huntingdonshire (VC31), Kincardineshire (VC91), Mid-west Yorkshire (VC64),
Middlesex (VC21), Monmouthshire (VC35), North Aberdeenshire (VC93), North Devon (VC4), North Ebudes (VC104),
North Essex (VC19), North Hampshire (VC12), North Somerset (VC6), Radnorshire (VC43), Shropshire (VC40),
South Aberdeenshire (VC92), South Essex (VC18), South Hampshire (VC11), South Lancashire (VC59), South Wiltshire (VC8), Staffordshire (VC39), Surrey (VC17), Warwickshire (VC38), West Gloucestershire (VC34),
West Kent (VC16), West Lancashire (VC60), West Norfolk (VC28), West Suffolk (VC26), Westerness (VC97),
Westmorland (VC69) and Worcestershire (VC37) (NBN
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 Austria,
Belgium, Bulgaria, Croatia, Czech Republic, Danish mainland, Estonia,
Finland, French mainland, Germany, Hungary, Italian mainland, Latvia,
Lithuania, Norwegian mainland, Poland, Romania, Russia - Central
and East, Slovakia, Slovenia, Spanish mainland, 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: