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 silvatica (Groschke, 1957)
[Diptera: Agromyzidae]

Phytobia (Dizygomyza) silvatica Groschke, 1957. Dt. ent. Z. (N.F.) 1: 118
Cerodontha (Dizygomyza) silvatica (Groschke, 1957); Spencer, 1990. Host specialization in the world Agromyzidae (Diptera) : 345, 351
Cerodontha silvatica (Groschke, 1957); Gibbs, 2003a. Dipterists Digest 10 (1): 61-65.

Leaf-miner: Long, rather narrow mine, upper surface or interparenchymal. The mine changes direction twice (upper to lower or vice versa). The mine frequently finishes in the leaf sheath. Frass in one or two large clumps (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.

Posterior spiracles widely separated, each with three strongly elongated nulbs, that stand out from their base like a hen's toes (Nowakowski, 1973).

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).

Adult: The adult is illustrated in the Encyclopedia of Life.

Hosts in Great Britain and Ireland:

Luzula sylvatica Great Wood-rush British Wild Flowers by John Somerville et al. Gibbs, 2003a: 61-65

Hosts elsewhere:

Luzula sylvatica Great Wood-rush British Wild Flowers by John Somerville et al. Bladmineerders van Europa
Luzula sylvatica Great Wood-rush British Wild Flowers by John Somerville et al. Spencer, 1990: 345

Time of year - larvae: April-Spetember, rarely November (Bladmineerders van Europa).

Time of year - adults: Currently unknown.

Distribution in Great Britain and Ireland: South Gloucester (Gibbs, 2003a: 61-5).

Distribution elsewhere: Not uncommon in northern and central Europe from Finland to Bulgaria (Spencer, 1990: 345), Czech Republic, Germany, Hungary and Poland (Fauna Europaea).

NBN Atlas links to known host species:

Luzula sylvatica

British and Irish Parasitoids in Britain and elsewhere:

Chrysocharis polyzo (Walker, 1839) Eulophidae: Entedoninae
Ichneumonoidea - Links to species no longer available  
Chorebus siniffa (Nixon, 1937) Braconidae: Alysiinae
Apodesmia posticatae (Fischer, 1957) Braconidae: Opiinae
Apodesmia similis (Sz├ępligeti, 1898) Braconidae: Opiinae

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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