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

N.B. Links to the latest version of 'Leafminers and plant galls of Europe' are being edited

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Metopomyza xanthaspis (Loew, 1858)
[Diptera: Agromyzidae]


Agromyza xanthaspis Loew, 1858. Wien. ent. Mschr. 2: 79
Agromyza xanthaspis Loew, 1858; Hendel, 1932. Fliegen palaearkt. Reg. 6(2): 264
Metopomyza xanthaspis (Loew, 1858); Spencer, 1972. Handbk Ident. Br. Insects X 5(g): 60, 122
Metopomyza xanthaspis (Loew, 1858); Spencer, 1976. Fauna ent. Scand. 5(1): 290, fig. 523.
Metopomyza xanthaspis (Loew, 1858); Spencer, 1990. Host specialization in the World Agromyzidae (Diptera) : 347, 348 (fig. 1312), 351.


Leaf-mine: Mine initially lower surface running towards the apex, later continuing down towards the leaf base on the upper surface (developing into a broad blotch, with frass scattered irregularly). Pupation external (Spencer, 1972b: 60).

The mine begins as a very narrow lower-surface corridor running in the direction of the leaf tip. Close to the tip the mine becomes upper-surface and redescends towards the leaf base, widening meanwihle, until all space between the midrib and a leaf margin is occupied. In the later parts of the mine frass in relatively coarse irregular grains. Pupation outside the mine (Bladmineerders van Europa).

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:

Cyperaceae        
Carex       Spencer, 1972b: 122

Hosts elsewhere:

Cyperaceae        
Carex       Spencer, 1976: 291
Carex       Spencer, 1990: 351
Carex       Bladmineerders van Europa

Time of year - mines: Currently unknown.

Time of year - adults: June.

Distribution in Great Britain & Ireland: Widespread in Britain including Suffolk (Barton Mills), Inverness (Cairgorms, Riach, Devil's Ditch) (Spencer, 1972b: 60); Glamorgan and South-west Yorkshire (NBN Atlas).

Distribution elsewhere: Widespread in western Europe including Denmark, Finland, Sweden (Spencer, 1976: 291), The Netherlands (Bladmineerders van Europa), Belgium (Scheirs, de Bruyn and von Tschirnhaus, 1995), Germany (Spencer, 1976: 562), Austria, Croatia, Czech Republic, Estonia, French mainland, Hungary, Latvia, Lithuania, Poland, Slovakia, Spanish mainland and Switzerland (Martinez in Fauna Europaea).

NBN Atlas links to known host species:

Host species unknown

British and Irish Parasitoids in Britain and elsewhere: Unknown.



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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