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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Liriomyza scorzonerae Rydén, 1951
[Diptera: Agromyzidae]


Liriomyza scorzonerae Rydén, 1951c. Opusc. ent. 16: 189
Liriomyza scorzonerae Rydén, 1951c; Spencer, 1976. Fauna ent. Scand. 5(1): 260, figs 479-80.
Liriomyza scorzonerae Rydén, 1951c; Spencer, 1990. Host specialization in the World Agromyzidae (Diptera) : 259, 263, 264 (figs 988-9), 399.


Leaf-mine: Larva initially forms a narrow lower surface linear mine, later producing a large blotch, frequently adjoining the leaf-margin on the upper surface. Several larva can feed together (Spencer, 1976: 269).

Upper-surface blotch at the leaf margin, preceded by a lower-surface corridor. Most frass in the centre of the blotch. Often several larvae in a mine. Primary and secondary feeding lines well visible. 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.

The larva is described by Hering (1967, as scariolae).

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-yellow; posterior spiracles each with an ellipse of some 8 bulbs (Spencer, 1976: 269).

Hosts in Great Britain & Ireland: Currently unknown.

Hosts elsewhere:

Asteraceae        
Lactuca       Spencer, 1990: 259
Lactuca serriola Prickly Lettuce British Wild Flowers by John Somerville et al. Bladmineerders van Europa
Scorzonera       Spencer, 1990: 259
Scorzonera humilis Viper's-grass   Spencer, 1976: 269
Scorzonera humilis Viper's-grass   Bladmineerders van Europa

Time of year - mines: May and August-September (Hering, 1957).

Time of year - adults: Currently unknown.

Distribution in Great Britain & Ireland: Added to British Checklist by Henshaw in Chandler, 1998: 138.

Distribution elsewhere: Widespread in continental Europe including Poland (Spencer, 1976: 269), Sweden (Spencer, 1976: 269; Bladmineerders van Europa), Czech Republic, Estonia, French mainland, Germany, Lithuania, Poland and Spanish mainland (Martinez in Fauna Europaea).

NBN Atlas links to known host species:

Lactuca serriola, Scorzonera humilis

British and Irish Parasitoids in Britain and elsewhere:

Ichneumonoidea  
Eurytenes abnormis (Wesmael, 1835) 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
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