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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Acrocercops brongniardella (Fabricius, 1798)
[Lepidoptera: Gracillariidae]

Elm Bent-wing


Tinea brongniardella Fabricius, 1798. Suppl. Ent. Syst.: 496
Acrocercops brongniardella (Fabricius, 1798).


Leaf-miner: A silvery sinuous gallery on the upper side, leading to a large, papery blotch. Sometimes several galleries lead to the same blotch (British leafminers).

The mine begins as a rather tortuous upper surface, epidermal, corridor. As a rule several mines on a leaf, and when the corridors widen they coalcesce into one white epidermal blotch. After a moult the larvae start feeding from the palissade parenchyma that forms the floor of their communal mine, which is not widened any more. Pupation outside the mine (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).

The larva is illustrated in Bladmineerders van Europa.

Acrocercops brongniardella larva,  dorsal
Acrocercops brongniardella larva, dorsal
Image: © Willem Ellis (Bladmineerders van Europa)

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

The pupa is in a silken cocoon amongst detritus; occasionally inside mine (British leafminers).

Adult: The adult is illustrated in UKMoths. The male genitalia, but not the female genitalia (check for update), are illustrated by the Lepidoptera. Dissection Group.

Hosts in Great Britain & Ireland:

Fagaceae        
Quercus       British leafminers
Quercus spp.     UKMoths
Quercus cerris Turkey Oak British Wild Flowers by John Somerville et al. Pitkin & Plant
Quercus ilex Evergreen Oak British Wild Flowers by John Somerville et al. Pitkin & Plant
Quercus petraea Sessile Oak British Wild Flowers by John Somerville et al. Pitkin & Plant
Quercus robur Pedunculate Oak British Wild Flowers by John Somerville et al. Pitkin & Plant
Hosts elsewhere:
Fagaceae        
Quercus       Belgian Lepidoptera
Quercus cerris Turkey Oak British Wild Flowers by John Somerville et al. Bladmineerders van Europa
Quercus dalechampii     Bladmineerders van Europa
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 Downy Oak   Bladmineerders van Europa
Quercus pyrenaica Pyrenean Oak   Bladmineerders van Europa
Quercus robur Pedunculate Oak British Wild Flowers by John Somerville et al. Bladmineerders van Europa

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

Time of year - adults: End of July. It can also overwinter and be found again in April and May (UKMoths).

Distribution in Great Britain & Ireland: Widespread in Britian including Bedfordshire, Caernarvonshire, Cambridgeshire, Denbighshire, Dorset, East Cornwall, East Norfolk, East Suffolk, Glamorgan, Hertfordshire, Huntigdonshire, Isle of Wight, Middlesex, North Ebudes, North Essex, North Hampshire, North Somerset, North Wiltshire, Shropshire, South Hampshire, South Wiltshire, South-west Yorkshire, Stafford, Surrey, West Gloucestershire, West Norfolk, West Suffolk and Worcestershire (NBN Atlas) and the Channel Islands. Also Fleet, Hampshire (British leafminers).

See also British leafminers distribution map.

Also recorded in the Northern Ireland (CEDAR database, pers. com. John McClean) and Republic of Ireland (Karsholt and van Nieukerken in Fauna Europaea and UKMoths). See also Ireland's NBDC interactive map.

 

Distribution elsewhere: Widespread in continental Europe including Austria, Belarus, Belgium, Bulgaria, Corsica, Croatia, Czech Republic, Danish mainland, Finland, French mainland, Germany, Greek mainland, Hungary, Italian mainland, Latvia, Luxembourg, Macedonia, Norwegian mainland, Poland, Portuguese mainland, Romania, Russia - Central, East, Northwest and South, Sardinia, Sicily, Slovakia, Spanish mainland, Sweden, Switzerland, The Netherlands and Ukraine (Karsholt and van Nieukerken in Fauna Europaea).

NBN Atlas links to known host species:

Quercus cerris, Quercus ilex, Quercus petraea, Quercus pubescens, Quercus pyrenaica, Quercus robur

British and Irish Parasitoids in Britain and elsewhere:

Chalcidoidea  
Chrysocharis nephereus (Walker, 1839) Eulophidae: Entedoninae
Ichneumonoidea  
Dolichogenidea dilecta (Haliday, 1834) Braconidae: Microgastrinae
Dolichogenidea laevissima (Ratzeburg, 1848) Braconidae: Microgastrinae
Oncophanes minutus (Wesmael, 1838) Braconidae: Rhyssalinae
Rhysipolis decorator (Haliday, 1836) Braconidae: Rhysipolinae
Rhysipolis meditator (Haliday, 1836) Braconidae: Rhysipolinae
Diadegma holopygum (Thomson, 1887) Ichneumonidae: Campopleginae
Encrateola laevigata (Ratzeburg, 1848) Ichneumonidae: Cryptinae
Eudelus simillimus (Taschenberg, 1865) Ichneumonidae: Cryptinae
Scambus calobatus (Gravenhorst, 1829) Ichneumonidae: Pimplinae


External links: Search the internet:

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

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Last updated 09-Nov-2017  Brian Pitkin Top of page