Dizygomyza
iridis Hendel, 1928. Blattminenkunde Europas. I. Die Dipterenminen.
Wien: 53
Cerodontha (Dizygomyza) iridis (Hendel, 1927); Spencer, 1972b. Handbk
ident. Br. Ins. 10(5g): 100
Cerodontha (Dizygomyza) iridis (Hendel, 1927); Spencer,
1990. Host specialization in the world Agromyzidae (Diptera)
: 331, 332 (figs 1266-7), 336.
|
Leaf-miner: A
number of larvae feeding together to form a conspicuous, mottled
greenish mine. Pupation laterally across the leaf at end of mine
(Spencer, 1972b: 100).
Two
to 12 eggs are separately inserted in a leaf, not far from the apex.
The young larvae begin making a short, narrow, corridor that runs
upwards. Soon the direction reverses, the corridors quickly become
wider and fuse. The result is a large blotchy mine, generally containing
several larvae. The mine is very inconstant in depth, making it
vary, when seen by transparency, from green to almost vitreous.
Mines contain several lumps of frass. Pupation in the mine. The
pupariria lie close together in a row, in the lowest part of the mine,
oriented perpendicularly to the leaf (Bladmineerders van Europa).
Forms a blotch mine, which may be large when several mines coalesce (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 by 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).
The puparium is illustrated in Bladmineerders van Europa.
Hosts in Great Britain and Ireland:
Hosts
elsewhere:
Time
of year - mines: Early Autumn (British
leafminers).
Time
of year - adults: Currently unknown.
Distribution
in Great Britain and Ireland: Abundant throughout southern
counties (Spencer, 1972b:
100) including Gloucester (Cheltenham) (British
leafminers); Isle of Wight, Radnorshire, South-west Yorkshire, Surrey and West Gloucestershire (NBN
Atlas). Distribution
elsewhere: Widespread in western Europe including French mainland,
Germany, Hungary, Italian mainland and Portuguese mainland (Fauna Europaea).
NBN Atlas links to known host species:
British and Irish Parasitoids in Britain and elsewhere:
|