The leaf and stem mines of British flies and other insects

(Coleoptera, Diptera, Hymenoptera and Lepidoptera)

by Brian Pitkin, Willem Ellis, Colin Plant and Rob Edmunds

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Caloptilia robustella Jäckh, 1972
[Lepidoptera: Gracillariidae]

New Oak Slender

Caloptilia robustella Jäckh, 1972. Atti Acad. Sci. Torino 106 (4): 552, fig'd.

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).

The mines and cones are the same as for Caloptilia alchimiella and the moth needs to be bred out to confirm identity (British leafminers).

Mine 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 leafminers).

Adult: The adult is illustrated in UKMoths. The male and female genitalia are illustrated by the Lepidoptera Dissection Group.

Caloptilia robustella

Adult of Caloptilia robustella
Image: © Trevor & Dilys Pendleton (Eakring Birds)

Hosts in Great Britain & Ireland:

Castanea sativa Sweet Chestnut British Wild Flowers by John Somerville et al. UKMoths
Fagus       UKMoths
Quercus       British leafminers
Quercus       Pitkin & Plant
Quercus       UKMoths

Hosts elsewhere:

Fagus       Belgian Lepidoptera
Fagus sylvatica Beech British Wild Flowers by John Somerville et al. Bladmineerders van Europa
Quercus       Belgian Lepidoptera
Quercus robur     Bladmineerders van Europa

Time of year - larvae: May - July, September - October (British leafminers).

Time of year - adults: A number of generations, any time between April and November (UKMoths).

Distribution in Great Britain & Ireland: Britain including Hampshire (Fleet) (British 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.

Also recorded in the Republic of Ireland (Karsholt and van Nieukerken in Fauna Europaea). See also Ireland's NBDC interactive map.

NBN Grid Map:

NBN Grid Map

Caloptilia robustella
NBN Grid Map : NBN Terms and Conditions

Maps are only displayed if the NBN server is active. N.B. Only publicly available records, if any, are shown by default

Distribution 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:

Castanea sativa

British and Irish Parasitoids in Britain and elsewhere:

Rhysipolis decorator (Haliday, 1836) Braconidae: Rhysipolinae
Rhysipolis meditator (Haliday, 1836) Braconidae: Rhysipolinae
Diadegma stigmatellae Horstmann, 1980 Ichneumonidae: Campopleginae
Diaglyptidea conformis (Gmelin, 1790) Ichneumonidae: Cryptinae
Scambus inanis (Schrank, 1802) Ichneumonidae: Pimplinae

External links: Search the internet:

Belgian Lepidoptera
Biodiversity Heritage Library
Bladmineerders van Europa
British leafminers
Encyclopedia of Life
Fauna Europaea
NBN Gateway
NHM UK Checklist

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Last updated 29-Jul-2016  Brian Pitkin Top of page