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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Cheilosia semifasciata Becker, 1894
[Diptera: Syrphidae]

Cheilosia semifasciata Becker, 1894. Nova Acta Acad. Leop. Carol. 62(3): 443
Chilosia alpina Strobl, 1898. Mitt. naturw. Ver. Steierm. 34: 225.


Leaf-mine: Full depth mine; in parts of the mine the parenchyma remain untouched. The larva enters and exits the leaf by means of an oval opening of 3-5 mm at the base, near the leaf edge. Pupation external (Bladmineerders van Europa).

Forms a deep mine with plentiful frass. The larva changes leaves entering and leaving near the leaf edge (British leafminers).

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 Rotheray (1988) and Stuke (2000). Posterior spiracles on a large common black spot; mandible with one tooth (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).

Comments: Chandler (1978) did not indicate whether his host records were British or Foreign and are therefore tentatively included under 'Hosts in Britain' and 'Hosts elsewhere'.

Hosts in Great Britain & Ireland:

Crassulaceae        

? Sedum

telephium Orpine British Wild Flowers by John Somerville et al. Chandler, 1978: 221
Sedum telephium Orpine British Wild Flowers by John Somerville et al. British leafminers
? Umbilicus       Chandler, 1978: 221
Umbilicus rupestris Navelwort British Wild Flowers by John Somerville et al. British leafminers

Hosts elsewhere:

Crassulaceae        
Sedum     Hering, 1957
Sedum rosea     Bladmineerders van Europa, as Rhodiola rosea

? Sedum

telephium Orpine British Wild Flowers by John Somerville et al. Chandler, 1978: 221
Sedum telephium Orpine British Wild Flowers by John Somerville et al. Bladmineerders van Europa
? Umbilicus       Chandler, 1978: 221
Umbilicus       Hering, 1957
Umbilicus rupestris Navelwort British Wild Flowers by John Somerville et al. Bladmineerders van Europa
Saxifragacae        
Saxifraga rotundifolia Round-leaved Saxifrage British Wild Flowers by John Somerville et al. Bladmineerders van Europa

Time of year - mines: May - June (British leafminers).

Time of year - adults: Currently unknown.

Distribution in Great Britain & Ireland: Widespread in southern England including Anglesey (VC52), Berkshire (VC22), Caernarvonshire (VC49), Cambridgeshire (VC29), Cardiganshire (VC46), Dorset (VC9), East Cornwall (VC2), Merionethshire (VC48), Montgomeryshire (VC47), North Hampshire (VC12), Oxfordshire (VC23), Shropshire (VC40), Surrey and West Kent (NBN Gateway).

Also recorded in the Republic of Ireland (Speight, 2004 in Fauna Europaea). Also Beltany approach path, Raphoe, Co. Donegal (British leafminers).

NBN Grid Map:

NBN Grid Map

Cheilosia semifasciata
NBN Grid Map : NBN Terms and Conditions

Maps are only displayed if the NBN server is active. N.B. Only publicly available records, if any, are shown by default

Distribution elsewhere: Widespread in continental Europe including The Netherlands and Belgium (van der Goot, 1981; Verlinden, 1991), Austria, Bosnia and Herzegovina, Bulgaria, Czech Republic, Finland, French mainland, Germany, Greek mainland, Hungary, Italian mainland, Luxembourg, Macedonia, Norwegian mainland, Poland, Romania, Slovakia, Sweden, Switzerland and Yugoslavia (Speight, 2004 in Fauna Europaea).

NBN Interactive Grid Maps of known host species:

Saxifraga rotundifolia, Sedum telephium, Umbilicus rupestris

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 Gateway
NHM UK Checklist
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