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Leaf-miner: The mines are found between veins. The initial gallery is narrow and then forms an orange-brown blotch (British leafminers).

Egg at the underside of the leaf. The mine is a small compact corridor, rather strongly widening towards the end, mostly in a vein axil. Colour of the mine often orange. Frass in a broad, irregular central line (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).

Bright yellow to orange. See Briolini (1961a) and Johansson et al. (1990a) for a description of the larva (Bladmineerders van Europa).

Pupa: The pupae of moths have visible head appendages, wings and legs which lie in sheaths (see examples).

Adult: The adult is not illustrated in UKMoths (check for update). The species is included in mothdissection.co.uk.

Comments: In the, mainly older, literature repeatedly is spoken also of Cydonia oblonga, next to Cotoneaster nebrodensis and Sorbus aria. The only nepticulid associated with Cydonia is Stigmella oxyacanthella, but it is hardly conceivable that incognitella could be confused with that species (Bladmineerders van Europa).

Hosts in Great Britain and Ireland:

Hosts elsewhere:

Rosaceae
Malus				Belgian Lepidoptera
Malus	baccata	Siberian Crab		Bladmineerders van Europa
Malus	pumila	Apple		Bladmineerders van Europa, as Malus domestica
Malus	floribunda	Japanese Crab		Bladmineerders van Europa
Malus	sylvestris	Crab Apple		Belgian Lepidoptera
Malus	sylvestris	Crab Apple		Bladmineerders van Europa, as Malus sylvatica

Time of year - larvae: June-July, October-November (British leafminers).

Time of year - adults: Currently unknown.

Distribution in Great Britain and Ireland: Britain including Caernarvonshire, Cheshire, East Kent, East Norfolk, East Suffolk, Glamorgan, Herefordshire, Monmouthshire, North Hampshire, Shropshire, Stafford, West Gloucestershire, West Norfolk, West Suffolk and Worcestershire (NBN Atlas).

See also British leafminers distribution map.

Distribution elsewhere: Widespread in continental Europe including Austria, Belarus, Belgium, Bosnia and Herzegovina, Corsica, Croatia, Czech Republic, Danish mainland, Finland, French mainland, Germany, Greek mainland, Hungary, Italian mainland, Latvia, Lithuania, Luxembourg, Poland, Portuguese mainland, Romania, Russia - Central and Northwest, Sardinia, Slovakia, Slovenia, Spanish mainland, Sweden, Switzerland, The Netherlands, Ukraine and Yugoslavia (Fauna Europaea).

NBN Atlas links to known host species:

British and Irish Parasitoids in Britain and elsewhere: