Galiomyza violiphaga [Diptera: Agromyzidae] in Leaf and stem mines of British flies and other insects

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

Galiomyza violiphaga (Hendel, 1932)
[Diptera: Agromyzidae]

Liriomyza violiphaga Hendel, 1932. Fliegen palaearkt. Reg. 6(2): 260
Metopomyza violiphaga (Hendel, 1932); Spencer, 1972b. Handbk ident. Br. Ins. 10(5g): 50
Metopomyza violiphaga (Hendel, 1932); Spencer, 1976. Fauna ent. Scand. 5 (1): 286-8
Galiomyza violiphaga (Hendel, 1932); Spencer, 1990. Host specialization in the World Agromyzidae (Diptera) : 76 (fig. 279), 77, 92, 402.

Leaf-miner: Large, conspicuous, upper-surface, whitish blotch, preceded by a short, in the end generally overrun, corridor. Most frass in fine grains; part of it lies in a broad band in the mine, that ends near the point where the larva has left the mine for pupation. Exit slit in upper epidermis. Frequently several larvae in a common 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.

The larva is described by de Meijere (1937) and Hering (1957a). Posterior spiracles each with 3 bulbs (Bladmineerders van Europa).

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 3 bulbs, one being distinctly elongated (Spencer, 1976: 288).

Hosts in Great Britain and Ireland:

Violaceae
Viola				Spencer, 1972b: 122

Hosts elsewhere:

Violaceae
Viola			Spencer, 1990: 92
Viola			Spencer, 1976: 288
Viola	ambigua		Bladmineerders van Europa
Viola	biflora	Alpine Yellow-violet	Bladmineerders van Europa
Viola	mirabilis		Bladmineerders van Europa
Viola	reichenbachiana	Early Dog-violet	Bladmineerders van Europa
Viola	silvatica		Spencer, 1976: 288
Viola	tricolor	Wild Pansy	Bladmineerders van Europa

Time of year - mines: July-August (Hering, 1957).

Time of year - adults: Currently unknown.

Distribution in Great Britain and Ireland: Widespread in Britain including Kent, Surrey, Breconshire, and Perth (Spencer, 1972b); East Kent and Merionethshire (NBN Atlas).

Also recorded in the Republic of Ireland (Fauna Europaea).

Distribution elsewhere: Widespread in western Europe including Austria, Denmark, Norway, Sweden, Switzerland (Spencer, 1976: 288) and French mainland (Fauna Europaea).

NBN Atlas links to known host species:

Viola reichenbachiana, Viola tricolor

British and Irish Parasitoids in Britain and elsewhere:

Ichneumonoidea - Links to species no longer available
Dacnusa maculipes Thomson, 1895	Braconidae: Alysiinae
Apodesmia similis (Szépligeti, 1898)	Braconidae: Opiinae


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


	Last updated 18-Oct-2019 Brian Pitkin