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


Phytomyza trollii Hering, 1930
[Diptera: Agromyzidae]

Phytomyza trollii Hering, 1930b. Z. angew. Ent. 17: 464
Phytomyza trollii Hering, 1930b; Hendel, 1935. Fliegen palaearkt. Reg. 6(2): 492
Phytomyza wahlbergi Rydén, 1951b. Ent. Tijdschr. 72(1-2): 179. [Synonymised by Spencer, 1976: 518]
Phytomyza trollii Hering, 1930b; Spencer, 1976. Fauna ent. Scand. 5(1): 518-20, figs 906-908A.
Phytomyza trollii Hering, 1930b; Spencer, 1990. Host specialization in the World Agromyzidae (Diptera) : 21, 23, 24 (figs 40-1).

Leaf-mine: Simple white linear mine; frass deposited in scattered black spots. Pupation external (Spencer, 1976: 520).

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. The larvae lie on their sides within the mine and use their pick-like mouthparts to feed on plant tissue.

Mandible with 2 teeth; rear spiraculum with 14-17 papillae (de Meijere, 1937a) (Bladmineerders van Europa).

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).

Black; posterior spiracles each on a stout conical protuberance with an ellipse of some 15 minute bulbs (Spencer, 1976: 520).

Brownish black (de Meijere, 1934a) (Bladmineerders van Europa).

Hosts in Great Britain and Ireland:

Trollius europeaus Globeflower British Wild Flowers by John Somerville et al. Bland, Godfray and Henshaw, 1999: 50

Hosts elsewhere:

Trollius       Spencer, 1990: 21
Trollius europeaus Globeflower British Wild Flowers by John Somerville et al. Spencer, 1976: 520
Trollius europeaus Globeflower British Wild Flowers by John Somerville et al. Bladmineerders van Europa

Time of year - larvae: Currently unknown.

Time of year - adults: Mid-September.

Distribution in Great Britain and Ireland: Recorded in Britain from a single male caught in a yellow water trap at Malham Tarn, North Yorkshire (Bland, Godfray and Henshaw, 1999: 50). Added to the British checklist by Henshaw in Chandler, 1998.

Distribution elsewhere: Widespread in continental Europe including Austria, Denmark, Finland, Norway, Sweden, Switzerland (Spencer, 1976: 520), Germany (Spencer, 1976: 578), Estonia, French mainland, Lithuania and Switzerland (Fauna Europaea).

NBN Atlas links to known host species:

Trollius europaeus

British and Irish Parasitoids in Britain and elsewhere:

Chrysocharis viridis (Nees, 1934) Eulophidae: Entedoninae

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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