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


Melanagromyza dettmeri Hering, 1933
[Diptera: Agromyzidae]


Melanagromyza dettmeri Hering, 1933. Konowia 12: 37
Melanagromyza dettmeri Hering, 1933; Spencer, 1966. Beitr. Ent. 16: 21. [in part]
Melanagromyza dettmeri Hering; Spencer, 1990. Host specialization in the World Agromyzidae (Diptera) : 251, 252 (figs 938-9), 253, 394, 395.

Stem borer: Larva feeds as an internal stem-borer (Spencer, 1976: 51).

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 larvae lie on their sides within the mine and use their pick-like mouthparts to feed on plant tissue.

Mandibles with one large and one small tooth (Spencer, 1976: 52, fig. 41); posterior spiracles virtually adjoining, each with an ellipse of some 15 bulbs around a strong central horn (Spencer, 1976: 51).

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).

Greyish-white (Spencer, 1976: 51).

Comments: Spencer (1966a: 21) and Spencer (1972b: 16, 19, 111, 112) misidentifed British specimens of oligophaga as dettmeri.

Hosts in Great Britain and Ireland: Currently unknown.

Hosts elsewhere:

Centaurea jacea Brown Knapweed   Spencer, 1990: 394

Time of year - larvae: Currently unknown.

Time of year - adults: Currently unknown.

Distribution in Great Britain and Ireland: Britain including Anglesey, Cardiganshire, Denbighshire, Glamorgan and South-east Yorkshire (NBN Atlas).

Distribution elsewhere: Widespread in continental Europe including Denmark (Spencer, 1990: 394), Belarus, Czech Republic, French mainland, Latvia, Lithuania, Poland, Slovakia, Spanish mainland and The Netherlands (Fauna Europaea).

NBN Atlas links to known host species:

Centaurea jacea

British and Irish Parasitoids in Britain and elsewhere:

Chlorocytus inchoatus Graham, 1965 Pteromalidae: Pteromalinae
Sphegigaster nigricornis (Nees, 1834) Pteromalidae: Pteromalinae
Syntomopus incisus Thomson, 1878 Pteromalidae: Pteromalinae
Syntomopus incurvus Walker, 1833 Pteromalidae: Pteromalinae
Ichneumonoidea - Links to species no longer available  
Chorebus cylindricus (Telenga, 1935) Braconidae: Alysiinae

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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