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


Isochnus foliorum (Müller, 1764)
[Coleoptera : Curculionidae]

Curculio foliorum Müller, 1764.
Isochnus foliorum (Müller, 1764)
Curculio saliceti
Paykull, 1792
Tachyerges scutellatus
Stephens, 1831

Leaf-miner: As far as known, larvae, pupae and mine are identical to those of I sequensi (= I. populi) - almost round, brown to brownish black, upper surface, very opaque blotch, about 1 cm in diameter, without an initial corridor. Upper epidermis leathery in colour. Often several mines in a leaf. All frass as a tar-like film on the floor of the mine (Bladmineerders van Europa).

Larva: The larvae of beetles have a head capsule and chewing mouthparts with opposable mandibles and lack abdominal legs (see examples).

Larva solitary.

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

Pupation in the mine; pupa not in a cocoon.

Hosts in Great Britain and Ireland:

Salix     Pitkin & Plant

Hosts elsewhere:

Salix     Bladmineerders van Europa

Time of year - larvae: August - October (Hering, 1957).

Time of year - adults: Currently unknown.

Distribution in Great Britain and Ireland: Widespread in Britain Ayrshire, Caernarvonshire, Cheshire, Cumberland, Denbighshire, Dumfriesshire, Durham, East Norfolk, East Ross, Glamorgan, Herefordshire, Mid-west Yorkshire, Monmouthshire, North Lincolnshire, North-east Yorkshire, South-west Yorkshire, Stafford, West Kent and West Suffolk (NBN Atlas).

Distribution elsewhere: Widespread in continental Europe including Bulgaria, French mainland, Germany, Italian mainland, Norwegian mainland, Poland, Slovakia, Svalbard and Jan Mayen and Yugoslavia (Fauna Europaea).

NBN Atlas links to known host species:

Host species unknown

British and Irish Parasitoids in Britain and elsewhere: Currently unknown.

External links: Search the internet:

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

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