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 avellanae (Donovan, 1797)
[Coleoptera : Curculionidae]


Curculio hortorum Fabricius, 1792
Curculio avellanae
Donovan, 1797
Curculio salicis
Fabricius, 1775
Rynchaenus scapularis
Beck, 1817
Orchestes signifer
Creutzer, 1799
Orchestes x-album
Stephens, 1831
Rynchaenus avellanae
(Donovan, 1797)
Orchestes avellanae
(Donovan, 1797)


Comment: The senior name is Orchestes hortorum (Fabricius, 1792) and will be included as such in the next Coleoptera Checklist (2016) (pers.comm Colin Plant ex Andrew Duff).

Leaf-miner: A gallery along the edge of the leaf leading to a circular blotch, from which a case is cut leaving a round hole (British leafminers, as O. signifer).

Rather short corridor along the leaf margin, widening into a circular blotch that usually is free from the margin. The mature larva makes an excision that includes almost all of the blotch, and thus sandwidched drops to the ground for pupation (Bladmineerders van Europa).

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, as O. signifer) and Bladmineerders van Europa.

Orchestes avellanae larva,  dorsal
Orchestes avellanae larva, dorsal
Image: © Willem Ellis (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:

Betulaceae        
Corylus       British leafminers, as O. signifer

Corylus

avellana

Hazel

British Wild Flowers by John Somerville et al. Plant, in Pitkin & Plant, 2005
Fagaceae        
Quercus       British leafminers, as O. signifer

Hosts elsewhere:

Fagaceae        
Quercus       Bladmineerders van Europa

Time of year - mines: Univoltine: early summer (British leafminers, as Orchestes signifer).

Time of year - adults: Currently unknown.

Distribution in Britain: Widespread including Bedfordshire (VC30), Berkshire (VC22), Buckinghamshire (VC24), Cumberland (VC70), Derbyshire (VC(57), Dorset (VC9), Dunbartonshire (VC99), East Cornwall (VC2), East Gloucester (VC33), East Kent (VC15), Herefordshire (VC36), Kirkcudbrightshire (VC73), Mid-west Yorkshire (VC64), Middlesex (VC21), North Essex (VC19), North Somerset (VC6), Northamptonshire (VC32), Nottinghamshire (VC56), South Hampshire (VC11), South Wiltshire (VC8), Staffordshire (VC39), Stirlingshire (VC86), Surrey (VC17), Warwickshire (VC38), West Gloucestershire (VC34), West Kent (VC16), West Norfolk (VC28), West Sussex (VC13) and Worcestershire (NBN Atlas, as Rynchaenus avellanae).

Distribution elsewhere: Europe including Bulgaria, ? Corsica, Czech Republic, Danish mainland, French mainland, Germany, Italian mainland, Moldova, Norwegian mainland, Poland, Russia - East and Northwest, Sardinia, Sicily, Slovakia, Switzerland Yugoslavia. Also recorded in the Near East (Alonso-Zarazaga in Fauna Europaea).

NBN Atlas links to known host species:

Host species unknown

Parasitoids:

Chalcidoidea   
Closterocerus trifasciatus Westwood, 1833 Eulophidae: Entedoninae
Cirrospilus diallus Walker, 1838 Eulophidae: Eulophinae


External links: Search the internet:

Biodiversity Heritage Library
Bladmineerders van Europa, as Orchestes avellanae
British leafminers, as Orchestes signifer
Encyclopedia of Life
Fauna Europaea
, as Orchestes avellanae
NBN Atlas, as Rynchaenus avellanae
NHM UK Checklist, as Orchestes signifer

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