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 heterophylli Bland, 1997
[Diptera: Agromyzidae]

Phytomyza heterophylli Bland, 1997b. Ent. Gaz. 48: 181-4.

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:

Cirsium heterophyllum Melancholy Thistle British Wild Flowers by John Somerville et al. 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:

Cirsium heterophyllum

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
Find using Google
Find using Google Scholar
Find images using Google

XHTML Validator
Last updated 04-Oct-2017 Brian Pitkin Top of page