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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Phytomyza trolliivora Hering, 1935
[Diptera: Agromyzidae]


Phytomyza trolliivora Hering, 1935a. Blattminen Mittel- Nordeuropas Lief 1: xii
Phytomyza trolliivora Hering, 1935a; Spencer, 1976. Fauna ent. Scand. 5(1): 520-2, figs 908B, 911-13.
Phytomyza trolliivora Hering, 1935a; Spencer, 1990. Host specialization in the World Agromyzidae (Diptera) : 21, 23, 24 (figs 36-7).


Leaf-mine: Blotch mine tending to fill a lobe of the palmate leaf. Near the beginning of the mine, the frass is concentrated in roughly concentric rings to form a dark spot and elsewhere the frass is arranged in loose series of lines and arcs. Mines often appear rusty and mottled. Larva leaves the mine through the lower surface to pupate externally, presumably in the soil (Bland, Godfray and Henshaw, 1999: 50)

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).

Hosts in Great Britain & Ireland:

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

Hosts elsewhere:

Ranunculaceae        
Trollius       Spencer, 1990: 21
Trollius europaeus Globeflower British Wild Flowers by John Somerville et al. Spencer, 1976: 521

Time of year - mines: Currently unknown.

Time of year - adults: September.

Distribution in Great Britain & Ireland: Recorded in Britain from a single male caught in a yellow water trap at Malham Tarn, North Yorkshire and ten empty mines on Trollius europaeus in Inverewe Gardens, near Gairloch in the Highlands (Bland, Godfray and Henshaw, 1999: 50). Also South-east Yorkshire (NBN Atlas).

Distribution elsewhere: Widespread in continental Europe including Germany, Denmark, Finland, Norway, Sweden (Spencer, 1976: 521), Estonia, French mainland, Lithuania and Switzerland (Martinez in Fauna Europaea).

NBN Atlas links to known host species:

Host species unknown

British and Irish Parasitoids in Britain and elsewhere:

Chalcidoidea   
Diglyphus isaea (Walker, 1838) Eulophidae: Eulophinae


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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