petoei Hering, 1924
Hering, 1924a. Z. wiss. InsektBiol. 19: 39, as petöi
Phytomyza petoei Hering, 1924a; Hendel, 1935. Fliegen
palaearkt. Reg. 6(2): 453
Phytomyza petoei Hering, 1924a; Spencer, 1972b. Handbk
ident. Br. Ins. 10(5g): 86 (fig. 289), 88, 116
Phytomyza petoei Hering, 1924a; Spencer, 1976. Fauna
ent. Scand. 5(1): 467-8, figs 819-822.
Phytomyza petoei Hering, 1924a; Spencer, 1990. Host
specialization in the World Agromyzidae (Diptera) : 205, 207,
208 (figs 774-5).
irregularly linear mine which may become a secondary blotch. Pupation
normally external, but not infrequently the puparium remains in
the leaf at the prepared exit slit (Spencer, 1972b: 86 (fig. 289), 88; Spencer,
1976: 467 (fig. 822, 468).
corridor, often branched and crossing itself, but not forming a
secondary blotch. Frass mainly in thread fragments. Pupaption generally
outside the mine. Sometimes pupation occurs within the mine, near
the lower epidermis, but then already an exit slit has been made,
and the spiracula do not penetrate the epidermis (Hering, 1924a,
1957a) - see Bladmineerders van Europa.
An irregular linear mine formed, commonly on garden mints. A secondary blotch may be formed (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 described by de Meijere (1937)
and Spencer (1973a). The
posterior spiracles each with approx. 25 bulbs.
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 an ellipse of some
25 bulbs (Spencer, 1976:
Hosts in Great Britain & Ireland:
of year - mines: June.
of year - adults: Currently unknown.
in Great Britain & Ireland: Probably not uncommon. London
(Hamsptead), Surrey (Epsom), Gloucester (Kilcot) (Spencer, 1972b: 88), Bedford (Lower Stondon) and Hampshire (Fleet) (British
leafminers) and Warwickshire (Coventry) (Robbins,
NBN Grid Map:
Distribution elsewhere: Widespread in continental Europe from Britain to the Balkans,
including Denmark (Spencer, 1976:
468), Germany (Spencer, 1976:
574), Switzerland (Mines in BMNH), Corsica, European Turkey, French
mainland, Lithuania, Poland, Romania, Spanish mainland and Yugoslavia
(Martinez in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: