• HOME
• About
  • Acknowledgements
  • Introduction
  • Methods
  • Morphology
  • Recent Changes
• Checklists
• Genus Index
• Species Index
• Keys
  • By Host Plant Genus
  • By Host Plant Common Name
  • To Liromyza species in Glasshouse and/or Quarantine Interceptions
• Parasitoids
• References
• Resources
• Search

Leaf-mine: Mine usually starts near tip of leaf as a small dark brown blotch; it expands rapidly due to the presence of several larvae in the same mine. This expansion is on a broad front but usually down only one side of the midrib. The final mine is a large brownish subtriangular blotch, which is darkest oin the vicinity of the origin.Under a hand lens, the mine is clearly marked with manyy small patches of parallel feeding-lines. The larvae leave the mine to pupate, but occasionally the pupariria are attached to the leaf near to the exit slit (Bland, 1997b: 181-4).

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).

Red-brown, elongate-ovoid, with the posterior spiracles each having 16-18 well-defined bulbs in an incomplete ellipse (Bland, 1997b: 181-4).

Hosts in Great Britain and Ireland:

Asteraceae
Cirsium	heterophyllum	Melancholy Thistle		Bland, 1997b: 181-4
Cirsium				Pitkin & Plant

Hosts elsewhere: Currently unknown.

Time of year - larvae: Late June to early August.

Time of year - adults: April-May the following year.

Distribution in Great Britain and Ireland: Southern highlands of Scotland (Bland, 1997b: 181-4).

Distribution elsewhere: Currently unknown (Fauna Europaea).

NBN Atlas links to known host species:

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