trolliivora Hering, 1935
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).
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:
of year - mines: Currently unknown.
of year - adults: September.
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
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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).
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British and Irish Parasitoids in Britain and elsewhere: