Oviposition by way of an ovipositor, no egg visible therefore.
The larva makes an irregular blotch. The part of the mine nearest
to the oviposition site is more thranslucent than the later, in
transparancy more greenish, part of the mine. The mine usually lies
close to the leaf tip, often several together. After its first moult
the larva makes a roundish excision, 3-4 mm in diameter. Sandwiched
herein it drops to the ground and continues feeding of dead leaves.
The excision occupies about half of the surface of the blotch (Bladmineerders van Europa).
mine is also described in UKMoths.
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).
while resting, take a horse-shoe like posture, unlike the larvae
of Antispila species (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 Andy Mackay.
genitalia are illustrated by the Lepidoptera Dissection Group. The
ovipositor comb of oehlmanniella is illustrated in British
leafminers alongside pectinea and masculella .
Hosts in Great Britain & Ireland:
of year - larvae:
Mining larvae are found in July - August (Bladmineerders van Europa).
of year - adults: The adults fly in June and July (UKMoths).
in Great Britain & Ireland: Widespread in much of the Britain
including Anglesey (VC52), Banffshire (VC94), Breconshire (VC42), Buckinghamshire (VC24), Caernarvonshire (VC49),
Cambridgeshire (VC29), Cardiganshire (VC46), Cheshire (VC58), Denbighshire (VC50), Derbyshire (VC57),
East Cornwall (VC2), East Kent (VC15), East Suffolk (VC25), East Sussex (VC14), Easterness (VC96),
Elgin, Flintshire (VC51), Glamorganshire (VC41), Herefordshire (VC36), Middlesex (VC21), North Aberdeenshire (VC93),
North Ebudes (VC104), North Essex (VC19), North Hampshire (VC12), North Somerset (VC6), North Wiltshire (VC7), North-east Yorkshire (VC62), Pembrokeshire (VC45), Shropshire (VC40), South Aberdeenshire (VC92), South Lancashire (VC59), South Wiltshire (VC8), South-west Yorkshire (VC63),
Staffordshire (VC39), Surrey (VC17), West Gloucestershire (VC34), West Kent (VC16), West Lancashire (VC60),
West Norfolk (VC28), West Suffolk (VC26), Westmorland (VC69) and Worcestershire (VC37) (NBN
Also recorded in the Republic of Ireland (Karsholt and van
Nieukerken in Fauna Europaea). See NDBC interactive map.
NBN Grid Map:
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elsewhere: Widespread in continental Europe including Albania,
Austria, Belgium, Bulgaria, Croatia, Czech Republic, Danish mainland,
Estonia, Finland, French mainland, Germany, Greek mainland, Hungary,
Italian mainland, Kaliningrad Region, Latvia, ? Luxembourg, Norwegian
mainland, Poland, Romania, Russia - Central, East, North, Northwest,
Slovakia, Spanish mainland, Sweden, Switzerland 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: Currently unknown.