tridentata Loew, 1858. Wien. ent. Mschr. 2:
Agromyza tridentata Loew, 1858; Hendel, 1932. Fliegen
palaearkt. Reg. 6(2): 295
Paraphytomyza tridentata (Loew, 1858); Spencer, 1972b. Handbk
ident. Br. Ins. 10(5g): 67
Paraphytomyza tridentata (Loew, 1858); Spencer, 1976. Fauna
ent. Scand. 5(1): 323-4, figs 586-7.
Paraphytomyza tridentata (Loew, 1858); Spencer, 1990. Host
specialization in the world Agromyzidae (Diptera) 81, 93.
Aulagromyza tridentata (Loew, 1858)
yellowish blotch. Pupation internal or external; a large exit slit
is cut and the puparium not infrequently remains at the end of the
mine (Spencer, 1976: 324).
primary blotch, almost invariably lower-surface. Pupation generally
outside the mine; less often the puparium is formed in the opening,
sometimes even in the closed mine. The exit slit (when made by the
larva) has a characteristic shape: a perfect semi-circle (Bladmineerders van Europa).
An elongated yellowish blotch, either upper surface, lower surface or starting lower surface and ending upper surface (British
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 illustrated in 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).
Yellowish-brown; posterior spiracles each with a somewhat irregular
ellipse of 20 minute bulbs (Spencer,
The puparium is illustrated in Bladmineerders van Europa.
Hosts in Great Britain & Ireland:
of year - mines: July-September.
of year - adults: Currently unknown.
in Great Britain & Ireland: Widespread in Britain including
Surrey (VC17), London, Oxford (Spencer, 1972b: 67, as Paraphytomyza), Midlothian (Blackford Hill
and Whitehouse Point) and West Lothian (Duddingstone Loch) (Bland,
1994c: 82, vacated mines only), Linlithgow (NBN
Atlas, as Paraphytomyza tridentata).
elsewhere: Widespread in continental Europe including Denmark,
Finland, Norway (Spencer, 1976:
323-4), The Netherlands, Luxembourg (Bladmineerders van Europa), Belgium (de
Bruyn and von Tschirnhaus, 1991), Germany (Spencer,
1976: 566), Italian mainland, Lithuania and Poland (Martinez
in Fauna Europaea).
extending eastwards to the Kirghiz Republic of the [former] U.S.S.R.
(Spencer, 1976: 323-4).
NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere: