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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Pegomya nigrisquama (Stein, 1888)
[Diptera: Anthomyiidae]


Chortophila nigrisquama Stein, 1888. Wien ent. Ztg 7: 290.
Pegomya nigrisquama (Stein, 1888).


Leaf-mine: The pale-coloured mine runs on the upper side irregularly to the sides, in the middle with blackish spots, where the frass is deposited. It starts in the center of a leaf and without a small mine leading to a large mine. Many mines in a leaf could finally cover the whole leaf (British leafminers).

Mine of Pegomya nigrisquama Image: Rob Edmunds (British leafminers)
Mine of Pegomya nigrisquama
Image: © Rob Edmunds (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.

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

Hosts in Great Britain & Ireland:

Asteraceae        
? Aster bellidiastrum     Ackland in Chandler, 1978: 228
Aster bellidiastrum     British leafminers
? Solidago virgaurea Goldenrod British Wild Flowers by John Somerville et al. Ackland in Chandler, 1978: 228
Solidago virgaurea Goldenrod British Wild Flowers by John Somerville et al. British leafminers

Hosts elsewhere:

Asteraceae        
Aster       Hering, 1957
? Aster bellidiastrum     Ackland in Chandler, 1978: 228
Aster bellidiastrum     Bladmineerders van Europa
? Solidago virgaurea Goldenrod British Wild Flowers by John Somerville et al. Ackland in Chandler, 1978: 228
Solidago       Hering, 1957
Solidago virgaurea Goldenrod British Wild Flowers by John Somerville et al. Bladmineerders van Europa

Time of year - mines: Autumn.

Time of year - adults: Currently unknown.

Distribution in Great Britain & Ireland: Recorded in Britain by Ackland (1978). Rarely found in the the UK. Recorded from Somerset, Oxford, Suffolk and Cambridge (British leafminers); Cambridgeshire, Dumfrieshire, Forfar, Middlesex, Oxfordshire, Peebles, West Gloucestershire, West Kent and West Suffolk (NBN Atlas).

Distribution elsewhere: Widespread in continental Europe including Czech Republic, French mainland, Germany, Poland, Slovakia and Switzerland (Michelsen in Fauna Europaea).

NBN Atlas links to known host species:

Solidago virgaurea

British and Irish Parasitoids in Britain and elsewhere:

Ichneumonoidea  
Biosteres carbonarius (Nees, 1834) 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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