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


Cerodontha pseuderrans (Hendel, 1931)
[Diptera: Agromyzidae]

Dizygomyza (Poemyza) pseuderrans Hendel, 1931. Fliegen palaearkt. Reg. 6(2): 46
Cerodontha (Butomyza) pseuderrans (Hendel, 1931); Nowakowski, 1967. Polskie Pismo ent. 37: 635
Cerodontha (Butomyza) pseuderrans (Hendel, 1931);Nowakowski, 1972. Polskie Pismo ent. 42(4): 753.
Cerodontha (Dizygomyza) fonsecai Spencer, 1971a. Entomologist's Gaz. 22: 154
Cerodontha (Dizygomyza) fonsecai Spencer, 1971a; Spencer, 1972b. Handbk ident. Br. Ins. : 100
Cerodontha (Butomyza) pseuderrans (Hendel, 1931); Spencer, 1976. Fauna ent. Scand. 5(1): 207-8, fig. 359.
Cerodontha (Butomyza) pseuderrans (Hendel, 1931); Spencer, 1990. Host specialization in the world Agromyzidae (Diptera) : 349, 350 (fig. 1321), 351.

Leaf-mine: Mine in the leaf apex. Frass in a few large lumps. Pupation within the mine (Bladmineerders van Europa).

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 Nowakowski (1973). Posterior spiracles at its base, laterally, with a black wart, which has an interior root; the warts are large and touch each other (Bladmineerders van Europa).

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).

Hosts in Great Britain and Ireland: Currently unknown.

Hosts elsewhere:

Carex hirta Hairy Sedge British Wild Flowers by John Somerville et al. Spencer, 1976: 208
Carex hirta Hairy Sedge British Wild Flowers by John Somerville et al. Spencer, 1990: 349
Carex hirta Hairy Sedge British Wild Flowers by John Somerville et al. Bladmineerders van Europa

Time of year - mines: July-Agust (Bladmineerders van Europa).

Time of year - adults: April-May.

Distribution in Great Britain and Ireland: Uncommon. Gloucestershire (Coombe Dingle, nr. Bristol), Herefordshire (Woolhope), Cambridgeshire (Chippenham Fen) and Suffolk (Barton Mills) (Spencer, 1972b: 100, as fonsecai).

Distribution elsewhere: Widespread in continental Europe including Austria, Germany, Poland, Sweden (Spencer, 1976: 208), Hungary and Lithuania (Fauna Europaea).

NBN Atlas links to known host species:

Carex hirta

British and Irish Parasitoids in Britain and elsewhere: Currently unknown.

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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