Leaf-miner: Usually a very small (but see below), pear-shaped, upper-surface
blotch, most of it stuffed with reddish-brown frass. Often several
mines in a leaf. Ovipisition is already in May, but the larvae hatch
late and initially develop very slowly; only against the end of
summer the mines become apparent. The larvae remain the the mine
and hibernate in the Fallén leaves. The bright-coloured frass and
their large number makes these mines very conspicuous in autumn,
despite their small size. The weevils feed pinhole-sized windows
in the leaf upperside (maturation feeding) (Bladmineerders van Europa).
mine is illustrated in British
Larva: The larvae of beetles have a head capsule and chewing mouthparts with opposable mandibles and lack abdominal legs (see examples).
The larva is illustrated in Bladmineerders van Europa.
Pupa: The pupae of beetles have visible head appendages, wings and legs which lie in sheaths (see examples).
Hosts in Great Britain & Ireland: Crataegus (Hawthorn), Sorbus aucuparia (Rowan), Prunus spinosa (Blackthorn)
of year - larvae: Univoltine: Autumn. Overwinters full grown
in the mine (British
of year - adults: Currently unknown.
in Great Britain & Ireland: Widespread in Britain including Anglesey (VC52),
Bedfordshire (VC30), Breconshire (VC42), Caernarvonshire (VC49), Cardiganshire (VC46), Cumberland (VC70),
Denbighshire (VC50), Derbyshire (VC57), Dorset (VC9), East Gloucestershire (VC33), East Kent (VC15),
East Norfolk (VC27), East Sussex (VC14), Flintshire (VC51), Glamorganshire (VC41), Hertfordshire (VC20),
Leicestershire (VC55), Merionethshire (VC48), Mid-west Yorkshire (VC64), Middlesex (VC21), Monmouthshire (VC35),
North Lincolnshire (VC54), North-east Yorkshire (VC62), Radnorshire (VC43), Shropshire (VC40),
South Hampshire (VC11), South Lincolnshire (VC53), South-west Yorkshire (VC63), Staffordshire (VC39),
Surrey (VC17), West Gloucestershire (VC34), West Kent (VC16), West Norfolk (VC28), West Suffolk (VC26),
Westmorland (VC69) and Worcestershire (VC37) (NBN
Also recorded in Ireland (InvertebrateIreland Online).
NBN Grid Map:
elsewhere: Widespread in continental Europe including Bulgaria,
Corsica, Finland, French mainland, Germany, Italian mainland, Moldova,
Poland, Russia - Central, East, Northwest and South, Sardinia, Sicily,
Sweden and Yugoslavia (Alonso-Zarazaga in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British Parasitoids in Britain and elsewhere: