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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Liriomyza tragopogonis (de Meijere, 1928)
[Diptera: Agromyzidae]


Liriomyza tragopogonis de Meijere, 1928. Tijdschr. Ent. 71: 161
Liriomyza tragopogonis de Meijere, 1928; Spencer, 1972b. Handbk ident. Br. Ins. 10(5g): 53 (figs 176-7), 55, 57, 115
Liriomyza tragopogonis de Meijere, 1928; Spencer, 1976. Fauna ent. Scand. 5(1): 266-7, figs 492-3
Liriomyza tragopogonis de Meijere, 192; Spencer, 1990. Host specialization in the World Agromyzidae (Diptera) : 259, 263, 264 (figs 994-5).


Leaf-mine: Green, later brownish corridor or more often an elongated whitish linear blotch overlying the midrib. The mine has short, irregular side branches. Frass in irrgular, dispsersed grains. Pupation outside the mine ( Bladmineerders van Europa ; Spencer, 1972b: 53 (fig. 177); Spencer, 1976: 273 (fig. 493), 275).

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.

The larva is described by de Meijere (1928). Posterior spiracles each with an ellipse of 7-10 bulbs (Spencer, 1972b: 55).

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).

Orange; posterior spiracles each with an ellipse of 7-10 bulbs (Spencer, 1976: 275).

Hosts in Great Britain & Ireland:

Asteraceae        
Tragopogon porrifolius Salsify British Wild Flowers by John Somerville et al. Robbins, 1991: 123
Tragopogon pratensis Goat's-beard British Wild Flowers by John Somerville et al. Mines in BMNH
Tragopogon pratensis Goat's-beard British Wild Flowers by John Somerville et al. Spencer, 1972b: 115

Hosts elsewhere:

Asteraceae        
Tragopogon porrifolius Salsify British Wild Flowers by John Somerville et al. Bladmineerders van Europa
Tragopogon pratensis Goat's-beard British Wild Flowers by John Somerville et al. Bladmineerders van Europa
Tragopogon pratensis Goat's-beard British Wild Flowers by John Somerville et al. Spencer, 1990: 263

Time of year - mines: July, October.

Time of year - adults: Currently unknown.

Distribution in Great Britain & Ireland: Widespread in Britain including London (Cripplegate); Middlesex (Scratch Wood); Essex (Stanford-Le-Hope), Norfolk (Norwich) (Spencer, 1972b: 55, as L. tragopogonis), Warwickshire (Coventry, Holbrooks) (Robbins, 1991: 123); North Somerset and South-west Yorkshire (NBN Gateway).

NBN Grid Map:

NBN Grid Map

Liriomyza tragopogonis
NBN Grid Map : NBN Terms and Conditions

Maps are only displayed if the NBN server is active. N.B. Only publicly available records, if any, are shown by default

Distribution elsewhere: Widespread in continental Europe including Sweden (Spencer, 1976: 267), Germany ( Bladmineerders van Europa ; Spencer, 1976: 562), Estonia, Hungary, Lithuania and Poland (Martinez in Fauna Europaea).

NBN Interactive Grid Maps of known host species:

Tragopogon porrifolius, Tragopogon pratensis

British and Irish Parasitoids in Britain and elsewhere:

Chalcidoidea   
Diglyphus isaea (Walker) Eulophidae: Eulophinae


External links: Search the internet:
Biodiversity Heritage Library
Bladmineerders van Europa
British leafminers
Encyclopedia of Life
Fauna Europaea
NBN Gateway
NHM UK Checklist
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