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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Orchestes pilosus (Fabricius, 1781)
[Coleoptera : Curculionidae]


Curculio pilosus Fabricius, 1781
Curculio ilicis
Fabricius, 1787
Rhynchaenus pilosus (Fabricius, 1781)
Orchestes pilosus (Fabricius, 1781).


Leaf-miner: Oviposition in the underside of a vein, usually the midrib. Here an oviposition scar remains. From this point a small full depth blotch develops, of about one cm in diameter, at the leaf margin, mostly in the leaf tip. The initial part of the mine, a quickly broadening corridor, later often tears. Frass blackish-green, in short thread fragments, pasted to the upper epidermis. Pupation in the mine, in a globular cocoon, made from secretion that is produced by the larva itself (Bladmineerders van Europa).

The mine is at the leaf margin and usually between two lobes (British leafminers).

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 British leafminers and Bladmineerders van Europa.

Orchestes pilosus larva,  dorsal

Orchestes pilosus larva, lateral
Image: © Willem Ellis (Bladmineerders van Europa)

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

Inside or outside the leaf (British leafminers).

Hosts in Great Britain & Ireland:

Fagaceae        
Quercus       British leafminers
Quercus       Pitkin & Plant
Quercus cerris Turkey Oak British Wild Flowers by John Somerville et al. Pitkin & Plant

Hosts elsewhere:

Fagaceae        
Quercus ilex Evergreen Oak British Wild Flowers by John Somerville et al. Bladmineerders van Europa
Quercus petraea Sessile Oak British Wild Flowers by John Somerville et al. Bladmineerders van Europa
Quercus pubescens     Bladmineerders van Europa
Quercus robur Pedunculate Oak British Wild Flowers by John Somerville et al. Bladmineerders van Europa

Time of year - larvae: April - June (British leafminers).

Time of year - adults: Currently unknown.

Distribution in Great Britain & Ireland: Widespread in Britain including Bedfordshire, Berkshire, Breconshire, Buckinghamshire, Cardiganshire, Carmarthenshire, Cheshire, Cumberland, Denbighshire, Derbyshire, Dorset, East Gloucestershire, East Kent, East Norfolk, East Ross, East Suffolk, Glamorgan, Herefordshire, Huntingdonshire, Leicestershire, Monmouthshire, Montgomeryshire, North Essex, North Wiltshire, North-east Yorkshire, Northamptonshire, Nottinghamshire, Oxfordshire, Radnorshire, Shropshire, South Hampshire, South Wiltshire, Stafford, Surrey, Warwickshire, West Gloucestershire, West Kent, West Norfolk, West Suffolk, West Sussex and Worcestershire (NBN Atlas)

Also recorded in the Republic of Ireland and Northern Ireland (Alonso-Zarazaga in Fauna Europaea) and in Ireland (InvertebrateIreland Online).

Distribution elsewhere: Widespread in continental Europe including Bulgaria, Corsica, French mainland, Germany, Italian mainland, Moldova, Norwegian mainland, Poland, Romania, Russia - Central and South, Sardinia, Sicily, Slovakia, Sweden, Ukraine and Yugoslavia. Also recorded in the Near East (Alonso-Zarazaga in Fauna Europaea).

NBN Atlas links to known host species:

Quercus cerris, Quercus ilex, Quercus petraea, Quercus robur

British and Irish Parasitoids in Britain and elsewhere: Currently unknown.



External links: Search the internet:

Biodiversity Heritage Library
Bladmineerders van Europa
Biodiversity Heritage Library
British leafminers
Encyclopedia of Life, as Curculio pilosus
Fauna Europaea
NBN Atlas

NHM UK Checklist

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