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

N.B. Links to the latest version of 'Leafminers and plant galls of Europe' are being edited

Join us on Facebook

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

Dizygomyza (Dizygomyza) morosa var. suturalis Hendel, 1931. Fliegen palaearkt. Reg. 6(2): 91
Cerodontha (Dizygomyza) suturalis (Hendel, 1931); Spencer, 1971a. Ent. Gaz. 22: 157
Cerodontha (Dizygomyza) suturalis (Hendel, 1931); Nowakowski, 1972. Polskie Pismo ent. 42(4): 760
Cerodontha (Dizygomyza) suturalis (Hendel, 1931); Spencer, 1972b. Handbk ident. Br. Ins. : 101
Cerodontha (Dizygomyza) suturalis (Hendel, 1931); Spencer, 1976. Fauna ent. Scand. 5(1): 218-20, fig. 378
Cerodontha (Dizygomyza) suturalis (Hendel, 1931); Spencer, 1990. Host specialization in the world Agromyzidae (Diptera) : 351, 352, 353 (fig. 1331), 380.


Leaf-mine: Mines and larvae indistinguishable from C. morosa. Mine relatively short and broad, not extending into leaf base. Pupation in the mine (Spencer, 1976: 219).

Upper-surface, interparenchymatous (therefore yellowish) corridor in the middle part of the leaf. The mine starts not far from the leaf tip, descends, and changes direction at least twice. Often in the end the corridor occupies the entire width of the leaf. Larva solitary. Frass in one big lump. Pupation inside the mine. The puparium is glued with frass to both the ceiling and the floor of the mine, parallel to the leaf vein (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 each with 3 extended bulbs (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).

Shining chestnut brown with ventrally and dorsally a broad diffuse brown black length zone; intersegmental constrictions rather deep (Nowakowski, 1973a) (Bladmineerders van Europa).

Hosts in Great Britain & Ireland:

Cyperaceae        
Carex       Mines in BMNH
Carex       Spencer, 1972b: 122
Carex paniculata Greater Tussock-sedge British Wild Flowers by John Somerville et al. Mines in BMNH
Carex paniculata Greater Tussock-sedge British Wild Flowers by John Somerville et al. Robbins, 1991: 133
Carex pendula Pendulous Sedge British Wild Flowers by John Somerville et al. Robbins, 1989: 21
Carex sylvatica Wood-sedge British Wild Flowers by John Somerville et al. Robbins, 1991: 133
Scirpus       Pitkin & Plant

Hosts elsewhere:

Cyperaceae        
Carex arenaria Sand Sedge British Wild Flowers by John Somerville et al. Bladmineerders van Europa
Carex hirta Hairy Sedge British Wild Flowers by John Somerville et al. Spencer, 1976: 219
Carex hirta Hairy Sedge British Wild Flowers by John Somerville et al. Bladmineerders van Europa
Carex hirta Hairy Sedge British Wild Flowers by John Somerville et al. Spencer, 1990: 352

? Scirpus

maritimus Sea Club-rush   Bladmineerders van Europa
Scirpus maritimus Sea Club-rush   Spencer, 1976: 219
Scirpus maritimus Sea Club-rush   Spencer, 1990: 352

Time of year - mines: July-August.

Time of year - adults: May-June.

Distribution in Great Britain & Ireland: Cambridge (Chippenham Fen), Suffolk (Barton Mills) (Spencer, 1972b: 101) and Warwickshire (Coombe and Kingsbury Wood) (Robbins, 1991: 133); Glamorgan, Westmorland and Monmouthshire (NBN Atlas).

Distribution elsewhere: Widespread in continental Europe including Denmark (Spencer, 1976: 219), The Netherlands (Bladmineerders van Europa), Germany (Spencer, 1976: 554), Austria, Belgium, Bulgaria, Czech Republic, Hungary, Lithuania, Poland and Slovakia (Martinez in Fauna Europaea).

NBN Atlas links to known host species:

Carex arenaria, Carex hirta, Carex paniculata, Carex pendula, Carex sylvatica, Scirpus maritimus

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
Find using Google
Find using Google Scholar
Find images using Google


XHTML Validator Last updated 02-Sep-2017 Brian Pitkin Top of page