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 krygeri Hering, 1949
[Diptera: Agromyzidae]

Phytomyza krygeri Hering, 1949d. Notul. ent. 29: 27
Phytomyza krygeri Hering, 1949d; Spencer, 1972b. Handbk ident. Br. Ins. 10(5g): 82, 118
Phytomyza krygeri Hering, 1949d; Spencer, 1976. Fauna ent. Scand. 5(1): 437-8, figs 763-4.
Phytomyza krygeri Hering, 1949d; Spencer, 1990. Host specialization in the World Agromyzidae (Diptera) : 22, 43, 48 (figs 181-2).

Seed-feeder: Larvae feeding in seed-capsules and pupating in the seed heads (Spencer, 1990: 43).

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 Dempewolf (2001: 191).

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).

Brown, deeply segmented; posterior spiracles strongly chitinised, each with an ellipse of some 25 bulbs; all segments have a band of short spinules which are particularly strong in the anal region (Spencer, 1976: 438).

Hosts in Great Britain & Ireland:

Aquilegia vulgaris Columbine British Wild Flowers by John Somerville et al. Spencer, 1972b: 118

Hosts elsewhere:

Aquilegia       Spencer, 1990: 43
Aquilegia vulgaris Columbine British Wild Flowers by John Somerville et al. Spencer, 1976: 438
Aquilegia vulgaris Columbine British Wild Flowers by John Somerville et al. Dempewolf, 2001: 191

Time of year - larvae: Currently unknown.

Time of year - adults: Currently unknown.

Distribution in Great Britain & Ireland: Oxford (Oxford) and Monmouthshire (St. Pierre) (Spencer, 1972b: 82); East Ross, Monmouthshire and Surrey (NBN Atlas).

Distribution elsewhere: Widespread in continental Europe including Denmark, Finland, Sweden (Spencer, 1976: 438), Germany (Dempewolf, 2001: 191), Czech Republic, Norwegian mainland, Poland and The Netherlands (Martinez in Fauna Europaea).

NBN Atlas links to known host species:

Aquilegia vulgaris

British and Irish Parasitoids in Britain and elsewhere:

Chrysocharis orbicularis (Nees, 1834) Eulophidae: Entedoninae
Seladerma sabbas (Walker, 1848) Pteromalidae: Miscogastrinae
Seladerma simplex (Thomson, 1876) Pteromalidae: Miscogastrinae

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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