British Insects: the Families of Diptera
British Insects: the Families of Diptera |
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~Diastatidae.
Adult insects. Winged. Antennae 3 segmented (the third segment long, reaching almost to the edge of the mouth); ‘modified’. Antennae aristate; the bristle dorsal. The second antennal segment not grooved. Ptilinal suture clearly defined. Mouthparts functional. The maxillary palps 1 segmented; porrect. Vibrissae present. Thorax without a continuous dorsal suture; without well defined posterior calli. Wings with a discal cell to without a discal cell (? - cf. Diastatidae?); with a closed anal cell. The anal cell short. The costa with two breaks (near the humeral cross vein, and near the apex of vein 1). Wings with the lower calypter much reduced or absent. Tibiae with a dorsal pre-apical bristle. Hind tibiae without strong bristles in the basal 4/5.
Larvae and pupae. Larvae acephalic. Pupa enclosed within a puparium.
Comments. Distinguishable from Diastatidae by the long third antennal segment, and in having two inset, upswept orbital bristles instead of one.
Classification. Suborder Brachycera; Division Muscomorpha Schizophora Acalyptratae; Superfamily Ephydroidea.
British representation: Genera 1; 2 species.
To view the illustrations with detailed captions, go to the interactive key. This also offers full and partial descriptions, diagnostic descriptions, differences and similarities between taxa, lists of taxa exhibiting or lacking specified attributes, and distributions of character states within any set of taxa.
Cite this publication as: ‘Watson, L., and Dallwitz, M.J. 2003 onwards. British insects: the families of Diptera. Version: 9th June 2008. http://delta-intkey.com’.