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 seitenstettensis (Strobl, 1880)
[Diptera: Anthomyiidae]


Anthomyia seitenstettensis Strobl, 1880. Progr. K. K. Obergymn. Benediktiner Seitenstetten 1880: 25
Pegomya angustiorbitae Suwa, 1974. Insecta matsum. 4: 198.
Pegomya seitenstettensis (Strobl, 1880).


Leaf-mine: Corridor, widening into a full depth blotch. At the start of the corridor a lower-surface elliptic egg shell. The larva is capable of leaving its mine and making a new blotch mine elsewhere. Frass in the corridor in a central line, in the blotch as scattered grains. Pupation outside the mine. (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.

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 record was British or Foreign and is therefore included under 'Hosts in Britain' and 'Hosts elsewhere'.

Hosts in Great Britain & Ireland:

Oxalidaceae        
? Oxalis acetosella Wood-sorrel British Wild Flowers by John Somerville et al. Ackland in Chandler, 1978: 228
Oxalis acetosella Wood-sorrel British Wild Flowers by John Somerville et al.

Andy Banthorpe

Hosts elsewhere:

Oxalidaceae        
Oxalis       Hering, 1957
? Oxalis acetosella Wood-sorrel British Wild Flowers by John Somerville et al. Ackland in Chandler, 1978: 228
Oxalis acetosella Wood-sorrel British Wild Flowers by John Somerville et al. Bladmineerders van Europa

Time of year - mines: Currently unknown.

Time of year - adults: Currently unknown.

Distribution in Great Britain & Ireland: Britain including Main Argyll, North Hampshire, Oxfordshire and Surrey (NBN Atlas). The species has recently (July 2013) been collected at Llyn Gerionydd, Snowdonia on Oxalis acetosella by Andy Banthrope and in Cumbria on Oxalis acetosella by Gary Hedges.

Distribution elsewhere: Widespread in continental Europe including Austria, Czech Republic, Denmark, Finland, Germany, Italian mainland, Norwegian mainland, Poland, Russia - Central and Northwest, Slovakia and Sweden (Michelsen in Fauna Europaea).

NBN Atlas links to known host species:

Oxalis acetosella

British and Irish Parasitoids in Britain and elsewhere:

Ichneumonoidea  
Heterolexis balteata (Thomson, 1895) Braconidae: Alysiinae
Eurytenes caelatus (Haliday, 1837) 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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