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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Parornix devoniella (Stainton, 1850)
[Lepidoptera: Gracillariidae]

Hazel Slender

Ornix devoniella Stainton, 1850. Trans. ent. Soc. Lond. (2) 1: 89.
Parornix devoniella
(Stainton, 1850).

Leaf-miner: Early mine a squarish or triangular blotch with brownish lower epidermis. Thereafter two or three successive folds formed by folding the leaf margin upwards (British leafminers).

Small, rectangular mine between two side veins (triangular when in a vein axil). The lower epidermis is brown. The larva begins feeding in the spongy parenchyma. Later also the palissade parenchyma along the outline of the mine is consumed. Finally all palissade parenchyma is eaten away, and the mine has become full depth and very transparant. Most frass in a cormer of the mine. After leaving the mine the larva lives in a rolled leaf margin. Here also pupation takes place (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.

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

In folded leaf-edge, usually on ground (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:

Corylus avellana Hazel British Wild Flowers by John Somerville et al. British leafminers
Corylus avellana Hazel British Wild Flowers by John Somerville et al. Pitkin & Plant
Corylus avellana Hazel British Wild Flowers by John Somerville et al. UKMoths

Hosts elsewhere:

Corylus avellana Hazel British Wild Flowers by John Somerville et al. Bladmineerders van Europa
Corylus colurna Turkish Hazel   Bladmineerders van Europa
Corylus maxima Filbert   Bladmineerders van Europa

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

Time of year - adults: Two generations, firstly in May and again in August (UKMoths).

Distribution in Great Britain & Ireland: Relatively common wherever its foodplant is found (UKMoths). Widespread in Britain including Bedfordshire (VC30), Breconshire (VC42), Buckinghamshire (VC24), Caernarvonshire (VC49), Cambridgeshire (VC29), Carmarthenshire (VC44), Cheshire (VC58), Derbyshire (VC57), East Cornwall (VC2), East Kent (VC15), East Norfolk (VC27), East Suffolk (VC25), East Sutherland (VC107), Flintshire (VC51), Glamorganshire (VC41), Herefordshire (VC36), Hertfordshire (VC20), Huntingdonshire (VC31), Merionethshire (VC48), Middlesex (VC21), Monmouthshire (VC35), North Aberdeenshire (VC93), North Devon (VC4), North Ebudes (VC104), North Essex (VC19), North Hampshire (VC12), North Somerset (VC6), Radnorshire (VC43), Shropshire (VC40), South Aberdeenshire (VC92), South Devon (VC3), South Essex (VC18), South Hampshire (VC11), South Lancashire (VC59), South Wiltshire (VC8), Staffordshire (VC39), Surrey (VC17), Warwickshire (VC38), West Cornwall (VC1), West Gloucestershire (VC34), West Kent (VC16), West Lancashire (VC60), West Norfolk (VC28), West Suffolk (VC26), Westmorland (VC69) and Worcestershire (VC37) (NBN Gateway).

See also British leafminers distribution map.

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

NBN Grid Map:

NBN Grid Map

Parornix devoniella
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, Belarus, Belgium, Bulgaria, Croatia, Czech Republic, Danish mainland, Estonia, Finland, French mainland, Germany, Hungary, Italian mainland, Latvia, Lithuania, Luxembourg, Republic of Moldova, Norwegian mainland, Poland, Romania, Russia - Central, East, Northwest and South, Slovakia, Slovenia, Sweden, Switzerland, The Netherlands, Ukraine. Also recorded in Near East (Karsholt and van Nieukerken in Fauna Europaea).

NBN Interactive Grid Maps of known host species:

Corylus avellana, Corylus colurna, Corylus maxima

British and Irish Parasitoids in Britain and elsewhere:

Achrysocharoides splendens (Delucchi, 1954) Eulophidae: Entedoninae
Chrysocharis phryne (Walker, 1839) Eulophidae: Entedoninae
Sympiesis acalle (Walker, 1848) Eulophidae: Eulophinae
Sympiesis gordius (Walker, 1839) Eulophidae: Eulophinae
Pholetesor circumscriptus (Nees, 1834) Braconidae: Microgastrinae
Rhysipolis hariolator (Haliday, 1836) Braconidae: Rhysipolinae
Diadegma elishae (Bridgman, 1884) Ichneumonidae: Campopleginae
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
Find using Google
Find using Google Scholar
Find images using Google

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Last updated 19-Sep-2016  Brian Pitkin Top of page