Leaf miner: Initially in short gallery becoming a blotch in the leaf. Later
in up to three cones at the edge of the leaf (UKMoths).
mines and cones are the same as for Caloptilia
alchimiella and the moth needs to be bred out to confirm
indistinguishable from those of Caloptilia
alchimiella (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).
Pupa: The pupae of moths have visible head appendages, wings and legs which lie in sheaths (see examples).
The pupa forms in a cocoon under a turned over leaf edge (British
The adult is illustrated in UKMoths. The male
genitalia are illustrated by the Lepidoptera Dissection Group.
Adult of Caloptilia robustella
Image: © Trevor & Dilys Pendleton (Eakring Birds)
Hosts in Great Britain & Ireland:
of year - larvae: May - July, September - October (British
of year - adults: A number of generations, any time between
April and November (UKMoths).
in Great Britain & Ireland: Britain including Hampshire
leafminers), Bedford (Studham) (UKMoths);
Bedfordshire (VC30), Buckinghamshire (VC24), Caernarvonshire (VC49), Cambridgeshire (VC29),
Dorset (VC9), East Norfolk (VC27), East Suffolk (VC25), Glamorganshire (VC41), Herefordshire (VC36), Hertfordshire (VC20),
Huntingdonshire (VC31), Middlesex (VC21), Monmouthshire (VC35), North Devon (VC4), North Essex (VC19),
North Hampshire (VC12), North Somerset (VC6), North Wiltshire (VC7), Northamptonshire (VC32),
Shropshire (VC40), South Aberdeenshire (VC92), South Devon (VC3), South Hampshire (VC11), South Lancashire (VC59), South Wiltshire (VC8), Staffordshire (VC39), Surrey (VC17), Warwickshire (VC38), West Gloucestershire (VC34), West Kent (VC16), West Norfolk (VC28), West Suffolk (VC26) and Worcestershire (VC37) (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 Austria,
Balearic Is., Belgium, Canary Is., Czech Republic, Danish mainland,
Estonia, Finland, French mainland, Germany, Hungary, Italian mainland,
Latvia, Lithuania, Luxembourg, Norwegian mainland, Poland, Romania,
Russia - Central, Sardinia, Sicily, 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: