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Brief Summary

    Lauxaniidae: Brief Summary
    provided by wikipedia

     src= Cestrotus species, showing camouflage suited to lichens on rocks

    The Lauxaniidae are a family of acalyptrate flies. They generally are small flies (length 7 mm or less) with large compound eyes that often are brightly coloured in life, sometimes with characteristic horizontal stripes, such as in Cestrotus species. Many species have variegated patterns on their wings, but in contrast they generally do not have variegated bodies, except for genera such as Cestrotus, whose camouflage mimics lichens or the texture of granitic rocks.

    Some 1800 species of Lauxaniidae have been described and they comprise some 126 genera. The family has a cosmopolitan distribution, most of the species occurring in tropical regions of Asia and the Americas; relatively few species occur in Afrotropical regions, and Lauxaniid species diversity declines strongly towards the more temperate regions; for example fewer than 200 European species have been described. Most species inhabit forests, where the adults usually are found sitting on leaves of the understory. They are far less common in open country, such as grassland habitats.

     src= Morphological details of Lauxaniidae
    Brief Summary
    provided by EOL authors

    Rather small flies, rarely more than 6 mm in length, the auxiliary vein entire and ending in the costa.

    The adults may be found almost everywhere, but particularly in moist places where they may occur in large numbers. Many of the species are more in evidence in the evening than during the rest of the day. They are not very active and are therefore easily captured.

    The larvae of at least some of the species mine in plants and are economically important; others live upon decaying vegetation.

Comprehensive Description

Morphology

    Morphology
    provided by EOL authors

    Rather small flies, rarely more than 6 mm in length, the auxiliary vein entire and ending in the costa.

    Head variable, the face projecting or retreating, convex, flat or concave, without oral vibrissa although these are rarely poorly developed. Front wide, with two pairs of frontals, the upper pair always reclinate, the lower pair sometimes decussate; ocellars present or minute. Antennae variable, the arista plumose to bare. Thorax with bristles, at least behind the suture; scutellum usually bare except for the marginal bristles; propleural bristle present or absent; one or two sternopleurals. Tibiae all with preapical bristle. Wing venation complete, the second basal and anal cells short; apical cell usually widely open. Abdomen oval, rarely elongate.