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


Phytoliriomyza pteridii Spencer, 1973
[Diptera: Agromyzidae]

Phytoliriomyza pteridii Spencer, 1973b. Entomologist's Gaz. 24: 315
Phytoliriomyza pteridii Spencer, 1973b; Spencer, 1990. Host specialization in the World Agromyzidae (Diptera) : 5, 9 (figs 15-6).

Leaf-miner: Larva forms a short linear mine at edge of frond segment. Mines practically identical to those of P. hilerella which may be distinguished from P. pteridii by the male genitalia. Pupation external.

Larva: The larvae of flies are leg-less maggots without a head capsule (see examples). They never have thoracic or abdominal legs. They do not have chewing mouthparts, although they do have a characteristic cephalo-pharyngeal skeleton (see examples), usually visible internally through the body wall.

Puparium: The puparia of flies are formed within the hardened last larval skin or puparium and as a result sheaths enclosing head appendages, wings and legs are not visible externally (see examples).

Brownish-orange, deeply segmented; posterior spiracles on short conical projections, each with an ellipse of 12-15 bulbs.

Hosts in Great Britain and Ireland:

Pteridium aquilinum Bracken Bracken - Pteridium aquilinum Spencer, 1973b: 315
Pteridium aquilinum Bracken Bracken - Pteridium aquilinum Robbins, 1991 : 20
Pteridium aquilinum Bracken Bracken - Pteridium aquilinum Reared adults in BMNH

Hosts elsewhere:

Pteridium       Spencer, 1990: 5

Time of year - mines: April.

Time of year - adults: Currently unknown.

Distribution in Great Britain and Ireland: Included in Robbins (1991: 20) from the 'north'.

Also recorded in the Republic of Ireland (Fauna Europaea).

Distribution elsewhere: Widespread in continental Europe including Germany (Berlin), Yugoslavia (Montenegro and Kolasin) and Slovenia (Postojna) (Spencer, 1973b: 315), Poland and Portuguese mainland (Fauna Europaea).

NBN Atlas links to known host species:

Pteridium aquilinum

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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