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

N.B. Links to the latest version of 'Leafminers and plant galls of Europe' are being edited

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Phyllonorycter acerifoliella (Zeller, 1839)
[Lepidoptera: Gracillariidae]

Maple Midget


Lithocolletis acerifoliella Zeller, 1839
Tinea sylvella
Haworth, 1828
Phyllonorycter acerifoliella
(Zeller, 1839).


Leaf-miner: The mine is small, usually in lobe of leaf, causing the lobe to fold downwards (British leafminers).

Relatively small, lower surface tentiform mine. The mine lies often under a leaf segment, and when the mine develops and contracts the segment usually folds down over the mine. The larva also feeds upon the palisade parenchyma of the roof of the mine, causing the upper surface of the leaf to appear damaged. Pupa blackish brown in a tight, thin-walled cocoon that is attached to the floor of the mine; all frass is accumulated in the opposite corner of 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).

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

The cremaster has four hooks (British leafminers). The pupa is illustrated in Bladmineerders van Europa.

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

Hosts in Great Britain & Ireland:

Aceraceae        
Acer campestre Field Maple British Wild Flowers by John Somerville et al. British leafminers
Acer campestre Field Maple British Wild Flowers by John Somerville et al. Pitkin & Plant
Acer campestre Field Maple British Wild Flowers by John Somerville et al. UKMoths

Hosts elsewhere:

Aceraceae        
Acer campestre Field Maple British Wild Flowers by John Somerville et al. Bladmineerders van Europa
Acer tataricum Tartar Maple   Bladmineerders van Europa

Time of year - larvae: July and more commonly in September and October (UKMoths).

Time of year - adults: The adults emerge in two generations, in May and August (UKMoths).

Distribution in Great Britain & Ireland: Widespread in England and Wales, including Bedfordshire, Breconshire, Buckinghamshire, Cambridgeshire, Cheshire, Denbighshire, Derbyshire, Dorset, Durham, East Gloucestershire, East Kent, East Norfolk, East Suffolk, Glamorgan, Herefordshire, Hertfordshire, Huntingdonshire, Isle of Wight, Leicestershire, Montgomeryshire, North Essex, North Hampshire, North Somerset, Northamptonshire, Radnorshire, Shropshire, South Hampshire, South Wiltshire, Stafford, Surrey, Warwickshire, West Gloucestershire, West Kent, West Lancaster, West Norfolk, West Suffolk, Westmorland and Worcestershire (NBN Atlas).

See also British leafminers distribution map.

Distribution elsewhere: Widespread in continental Europe including Albania, Austria, Belarus, Belgium, Bulgaria, Czech Republic, Danish mainland, French mainland, Germany, Hungary, Italian mainland, Republic of Moldova, Poland, Romania, Russia - Central and South, Slovakia, Sweden, Switzerland, The Netherlands, Ukraine, Yugoslavia. Also recorded in Near East (Karsholt and van Nieukerken in Fauna Europaea).

NBN Atlas links to known host species:

Acer campestre, Acer tataricum

British and Irish Parasitoids in Britain and elsewhere:

Chalcidoidea  
Achrysocharoides acerianus Askew, 1974 Eulophidae: Entedoninae
Achrysocharoides cilla (Walker, 1839) Eulophidae: Entedoninae
Chrysocharis elongata (Thomson, 1878) Eulophidae: Entedoninae
Chrysocharis laomedon (Walker, 1839) Eulophidae: Entedoninae
Chrysocharis nephereus (Walker, 1839) Eulophidae: Entedoninae
Cirrospilus lyncus Walker, 1841 Eulophidae: Eulophinae
Sympiesis gordius (Walker, 1839) Eulophidae: Eulophinae
Ichneumonoidea  
Coloneura stylata Förster, 1862 Braconidae: Alysiinae
Colastes braconius Haliday, 1833 Braconidae: Exothecinae
Pholetesor bicolor (Nees, 1834) Braconidae: Microgastrinae
Pholetesor laetus (Marshall, 1885) Braconidae: Microgastrinae
Diadegma holopygum (Thomson, 1887) Ichneumonidae: Cryptinae


External links: Search the internet:
Belgian Lepidoptera
Biodiversity Heritage Library
Bladmineerders van Europa
British leafminers
Encyclopedia of Life

Fauna Europaea
NBN Atlas
NHM UK Checklist
UKMoths
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Last updated 10-Aug-2017  Brian Pitkin Top of page