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

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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 & Ireland:

Odontites vernus Red Bartsia British Wild Flowers by John Somerville et al. Spencer, 1972b: 120

Hosts elsewhere:

Odontites rubra     Spencer, 1976: 434
Odontites vernus Red Bartsia British Wild Flowers by John Somerville et al. Spencer, 1990: 222

Time of year - larvae: Currently unknown.

Time of year - adults: Currently unknown.

Distribution in Great Britain & 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 (Martinez in Fauna Europaea).

NBN Atlas links to known host species:

Odontites rubra, Odontites vernus

British and Irish Parasitoids in Britain and elsewhere:

Systasis encyrtoides Walker, 1834 Pteromalidae: Ormocerinae
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
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Last updated 19-Jun-2017 Brian Pitkin Top of page