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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Elachista triatomea (Haworth, 1828)
[Lepidoptera: Elachistidae]

Meadow Dwarf

Porrectaria triatomea Haworth, 1828. Lep. Brit.: 535.
Elachista triatomea
(Haworth, 1828).

? Leaf-miner: Details unknown.

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).

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:

Festuca       UKMoths
Festuca ovina Sheep's Fescue British Wild Flowers by John Somerville et al. Pitkin & Plant
Festuca rubra Red Fescue British Wild Flowers by John Somerville et al. Pitkin & Plant
Festuca filiformis Fine-leaved Sheep's-fescue British Wild Flowers by John Somerville et al.

Pitkin & Plant, as Festuca tenuifolia

Hosts elsewhere: Currently unknown.

Time of year - larvae: Currently unknown.

Time of year - adults: The adult moths fly in June and July, and frequent grassland (UKMoths).

Distribution in Great Britain & Ireland: From south-east England to southern Scotland (UKMoths) including Banffshire, Bedfordshire, Berkshire, Buckinghamshire, Caenarvonshire, Cambridgeshire, Cheshire, Cheviotland, Derbyshire, Dorset, Durham, East Norfolk, East Ross, East Suffolk, Herefordshire, Hertfordshire, North Ebudes, North Essex, North Hampshire, Northumberland South, Shropshire, South Lancaster, Sout-east Yorkshire, South-west Yorkshire, Stafford, West Gloucestershire, West Norfolk, West Suffolk and Worcestershire (NBN Atlas).

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

Distribution elsewhere: Widespread in continental Europe including Austria, Danish mainland, Finland, Germany, Hungary, Norwegian mainland, Romania and Sweden (Karsholt and van Nieukerken in Fauna Europaea).

NBN Atlas links to known host species:

Festuca filiformis, Festuca ovina, Festuca rubra

British and Irish Parasitoids in Britain and elsewhere:

Pholetesor viminetorum (Wesmael, 1837) Braconidae: Microgastrinae

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

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Last updated 21-Jul-2017  Brian Pitkin Top of page