Phytomyza isais [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

Phytomyza isais Hering, 1936
[Diptera: Agromyzidae]

Phytomyza isais Hering, 1936. Dt. ent. Z. (N.F.) 9(1-2): 49
Phytomyza odontites Hering, 1949d. Notul. ent. 29: 24
Phytomyza isais Hering, 1936; Spencer, 1972b. Handbk ident. Br. Ins. 10(5g): 75, 120
Phytomyza isais Hering, 1936; Spencer, 1976. Fauna ent. Scand. 5(1): 434-5, figs 757-758.
Phytomyza isais Hering, 1936; Spencer, 1990. Host specialization in the World Agromyzidae (Diptera) : 222, 227, 228 (fig. 856).

Seed-feeder: Larvae feeding and pupating in the seed-heads (Spencer, 1972b: 75; Spencer, 1976: 434).

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).

Shining black (Spencer, 1972b: 75; Spencer, 1976: 434).

Hosts in Great Britain and Ireland:

Scrophulariaceae
Odontites	vernus	Red Bartsia		Spencer, 1972b: 120

Hosts elsewhere:

Scrophulariaceae
Odontites	rubra		Spencer, 1976: 434
Odontites	vernus	Red Bartsia	Spencer, 1990: 222

Time of year - larvae: Currently unknown.

Time of year - adults: Currently unknown.

Distribution in Great Britain and Ireland: Local. Surrey (Chipstead) (Spencer, 1972b: 75); Anglesey, Cardiganshire and West Gloucestershire (NBN Atlas).

Distribution elsewhere: Widespread in continental Europe including Germany, Denmark (Spencer, 1976: 434), French mainland, Lithuania and Poland (Fauna Europaea).

NBN Atlas links to known host species:

Odontites rubra, Odontites vernus

British and Irish Parasitoids in Britain and elsewhere:

Chalcidoidea
Systasis encyrtoides Walker, 1834	Pteromalidae: Ormocerinae
Ichneumonoidea - Links to species no longer available
Opius caudifer Fischer, 1958	Braconidae: Opiinae
Opius longicornis Thomson, 1895	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 10-Jul-2019 Brian Pitkin