British Insects: the Families of Diptera
| British Insects: the Families of Diptera | |
Heteroneuridae.
Adult insects. Very small to small. Antennae 3 segmented; ‘modified’. Antennae aristate (and the second segment with both an upper and a lower bristle); the bristle apical to dorsal (subapical, pubescent). The second antennal segment not grooved. Ptilinal suture clearly defined. Lower orbital bristles present. Post-vertical orbital bristles present; divergent. 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; with a closed anal cell. The anal cell short. The costa with one break (near the end of the sub-costa). Sub-costa apparent; reaching the costa independently of vein 1. Vein 6 present; falling short of the wing margin. Wings with the lower calypter much reduced or absent. Tibiae with a dorsal pre-apical bristle, or without a dorsal pre-apical bristle. Hind tibiae without strong bristles in the basal 4/5.
Larvae and pupae. Larvae terrestrial; saprophagous, or mycophagous (in rotting wood); acephalic. Pupa enclosed within a puparium.
Comments. Very small to small flies, often associated with rotting wood and fungi.
Classification. Suborder Brachycera; Division Muscomorpha Schizophora Acalyptratae; Superfamily Opomyzoidea.
British representation: Genera 4; 10 species.
Illustrations: • Clusia flava (from Walker). See notes for legend.
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 April 2007. http://delta-intkey.com’.
