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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Cerodontha atra (Meigen, 1830)
[Diptera: Agromyzidae]

Agromyza atra Meigen, 1830. Syst. Beschr. 6: 178
Cerodontha (Poemyza) atra (Meigen, 1830); Nowakowski, 1962. Annls zool., Warsz. 20: 123
Cerodontha (Poemyza) atra (Meigen, 1830); Nowakowski, 1967. Polskie Pismo ent. 37: 646
Cerodontha (Poemyza) atra (Meigen, 1830); Nowakowski, 1972. Polskie Pismo ent. 42(4): 743
Cerodontha atra (Meigen, 1830); Spencer, 1972b. Handbk ident. Br. Ins. 10(5g): 103 (fig. 353), 104
Cerodontha (Poemyza) atra (Meigen, 1830); Spencer, 1976. Fauna ent. Scand. 5(1): 188-9, fig. 330
Cerodontha (Poemyza) atra (Meigen, 1830); Spencer, 1990. Host specialization in the world Agromyzidae (Diptera) : 354, 367, 368 (fig. 1376).


Leaf-mine: Lower-surface corridor in the top half the leaf blade; the mine changes direction at least two times. One to three larvae in a mine. Frass in rather regular granules (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). The description of the larva by de Meijere (1925a) is based on material from Phragmites, and therefore refers to C. phragmitidis (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).

The puparium is described by Nowakowski (1973). Pupation mostly outside the mine (Bladmineerders van Europa).

Hosts in Great Britain & Ireland:

Poaceae        
Phragmites       Pitkin & Plant

Hosts elsewhere:

Poaceae        
Agrostis       Spencer, 1990: 357
Agrostis stolonifera Creeping Bent British Wild Flowers by John Somerville et al. Spencer, 1976: 188
Agrostis stolonifera Creeping Bent British Wild Flowers by John Somerville et al. Bladmineerders van Europa
Calamagrostis       Spencer, 1990: 354
Calamagrostis epigejos Wood Small-reed British Wild Flowers by John Somerville et al. Spencer, 1976: 188
Calamagrostis epigejos Wood Small-reed British Wild Flowers by John Somerville et al. Bladmineerders van Europa
Dactylis       Pitkin & Plant
Dactylis       Robbins, 1991

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

Time of year - adults: May, August.

Distribution in Great Britain & Ireland: Probably widespread at least in southern England. Records include Kent (Otford), Surrey (Box Hill) (Spencer, 1972b: 104), Cambridgeshire, Dorset, Glamorgan, North Hampshire, North Somerset and South-west Yorkshire (NBN Atlas).

Distribution elsewhere: Widespread and common in continental Europe including Denmark, Sweden, Finland (Spencer, 1976: 188), Belgium (Scheirs, de Bruyn and von Tschirnhaus, 1995), Germany (Spencer, 1976: 554), Austria, Belarus, Corsica, Czech Republic, Estonia, French mainland, Hungary, Italian mainland, Latvia, Lithuania, Poland, Romania, Slovakia, Switzerland and Yugoslavia (Martinez in Fauna Europaea).

NBN Atlas links to known host species:

Agrostis alba, Agrostis stolonifera, Calamagrostis epigejos

British and Irish Parasitoids in Britain and elsewhere:

Chalcidoidea   
Chrysocharis polyzo (Walker, 1839) Eulophidae: Entedoninae


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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