cardui (Meigen, 1826)
cardui Meigen, 1826. Syst. Beschr. 5:
Delia floricola Robineau-Desvoidy, 1830. Essai Myod.
Anthomyia impressitarsis Macquart,
1835. Hist. nat. Ins., Dipt. 2: 335
Chortophila laminifera Rondani, 1866. Atti Soc. ital.
Sci. nat., Milano 9: 167.
Delia cardui (Meigen, 1826).
Mine always arising from the leaf base or ending in it, because
the larva mines and changes leaves. Mine often broad, irregular
corridor like, often touching the midrib. At first corridor often
entirely without frass, later in the spring the mines are often
less deep, containing thick, irregularly deposited frass lumps.
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).
The records of Delia cardui on Lychnis and Silene
are unsubtantiated (Mike Ackland, pers. comm.). Ackland in
Chandler (1978) did not
indicate whether his host records were British or Foreign and are
therefore tentatively included under 'Hosts in Britain' and 'Hosts
coronaria is treated as Silene
coronaria (Rose Campion) by Stace (2010).
Hosts in Great Britain & Ireland:
of year - mines: Currently unknown.
of year - adults: Currently unknown.
in Great Britain & Ireland: Britain including Warwickshire
(Coventry and Stoke) (Robbins,
1991: 33); Berkshire (VC22), East Kent (VC15), Easterness (VC96), Glamorganshire (VC41), North
Somerset and Surrey (NBN
elsewhere: Widespread in continental Europe including Austria,
Belgium, Corsica, Czech Republic, Denmark, French mainland, Germany,
Greek mainland, Hungary, Italian mainland, Norwegian mainland, Poland,
Russia - Northwest, Slovakia, Sweden, Switzerland and The Netherlands
(Michelsen in Fauna Europaea).
recorded in the Near East and Nearctic Region (Michelsen in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: Currently unknown.