|
||||||
|
Phytomyza
crassiseta Zetterstedt, 1860 Phytomyza
crassiseta Zetterstedt, 1860. Dipt. Scand. 14:
6469 |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
Leaf-miner: Mine normally begins along margin of leaf, sometimes later developing into a secondary blotch. Pupation takes place on the lower surface of the leaf, with the anterior spiracles normally projecting through the epidermis (Spencer, 1972b: 82, 83 (fig. 271). Wide upper-surface corridor. The first part closely follows the leaf margin. Later the margin is released, often then the corridor is so densely wound that a secondary blotch is formed. Finally a short short stretch is made that ends in a lower-surface puparial chamber. Frass in isolated grains or pearl chains (Bladmineerders van Europa). Forms a narrow mine which follows the leaf margin, then turns and forms a secondary blotch. Pupation is in the mine (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 de Meijere (1926 and 1941) and illustrated in Bladmineerders van Europa ; posterior spiracles each with approx. 8 bulbs. 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. Slender, white or yellowish, with a conspicuous dark band running centrally along the ventral surface (Spencer, 1972b: 82; Spencer, 1976: 408). Hosts in Great Britain and Ireland:
Hosts elsewhere: Time of year - mines: June-July, September-November. Time of year - adults: Currently unknown. Distribution in Great Britain and Ireland: Widespread in Britain including Surrey (Mickleham), Devon (Bolt Head), Huntingdonshire (Woodwalton Fen), Cambridgeshire (Chippenham Fen), Dunbartonshire (Spencer, 1972b: 82), Warwickshire (Foleshill) (Robbins, 1991: 99); Cambridgeshire, East Ross, Edinburgh, North Somerset, Pembrokeshire, South Devon, South-west Yorkshire and Surrey (NBN Atlas). Also recorded in the Republic of Ireland: Co. Clare (Burren), Co. Down (Rostrevor Wood) and Co. Galway (Galway) (Spencer, 1972b: 82). Distribution elsewhere: Common throughout much of Europe including Denmark, Finland, Norway, Sweden (Spencer, 1976: 408); The Netherlands, Luxembourg (Bladmineerders van Europa), Germany (Spencer, 1976: 570), Belarus, Canary Is., Czech Republic, Estonia, French mainland, Hungary, Italian mainland, Latvia, Lithuania, Poland, Romania and Spanish mainland (Fauna Europaea). Also present in the U.S.A. and Canada, almost certainly as an introduction (Spencer, 1990). NBN Atlas links to known host species: British and Irish Parasitoids in Britain and elsewhere:
|
| Last updated 10-Jul-2019 Brian Pitkin |  |
|