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 angulicornis (Malloch, 1918)
[Diptera: Agromyzidae]

Agromyza angulicornis Malloch, 1918. Can. Ent. 50: 79
Liriomyza triglochin Hendel, 1931. Fliegen palaearkt. Reg. 6(2): 253
Liriomyza angulicornis (Malloch, 1918); Spencer, 1972b. Handbk ident. Br. Ins. 10(5g): 50
Liriomyza angulicornis (Malloch, 1918); Spencer, 1976. Fauna ent. Scand. 5(1): 230, figs 388-90.
Liriomyza angulicornis (Malloch, 1918); Spencer, 1990. Host specialization in the World Agromyzidae (Diptera) : 339 (figs 1285-8), 340, 341.

Leaf-mine: A long narrow leaf-mine which winds round the filiform leaves and can penetrate deeper into the parenchyma, becoming invisible. Pupation internal (Spencer, 1976: 230).

Narrow corridor, spiralling around the leaves. Often part of the corridor in the deeper layers of the leaf. Frass in strings. Pupation generally within 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).

Reddish; posterior spiracles each with 3 rather large bulbs (Spencer, 1976: 230).

Comments: Both Liriomyza angulicornis and Liriomyza latipalpis can occur in the same plant (Spencer, 1990).

Hosts in Great Britain and Ireland:

Triglochin maritimum Sea Arrowgrass   Mines in BMNH
Triglochin maritimum Sea Arrowgrass   Spencer, 1972b: 125
Triglochin palustre Marsh Arrowgrass   Spencer, 1972b: 125

Hosts elsewhere:

Triglochin maritimum Sea Arrowgrass   Spencer, 1990: 340
Triglochin maritimum Sea Arrowgrass   Spencer, 1976: 230
Triglochin maritimum Sea Arrowgrass   von Tschirnhaus, 1981
Triglochin maritimum Sea Arrowgrass   Bladmineerders van Europa
Triglochin palustre Marsh Arrowgrass   Spencer, 1990: 340
Triglochin palustre Marsh Arrowgrass   Spencer, 1976: 230
Triglochin palustre Marsh Arrowgrass   von Tschirnhaus, 1981

Time of year - mines: July-August.

Time of year - adults: Currently unknown.

Distribution in Great Britain and Ireland: Kent (Gravesend), Dorset (Studland), Suffolk (Aldeburgh and Barton Mills) (Spencer, 1972b: 125); Anglesey, Glamorgan and West Norfolk (NBN Atlas).

Distribution elsewhere: Widespread in continental Europe including Denmark, Finland, Sweden (Spencer, 1976: 230), Germany, Lithuania and Poland (Fauna Europaea).

Also recorded in the U.S.A. and Canada (Spencer, 1976: 230).

NBN Atlas links to known host species:

Triglochin maritimum, Triglochin palustre

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
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