Canacidae, incorrectly Canaceidae, or beach flies, surf or surge flies, is a family of Diptera. There are 113 species in 12 genera. The family now includes Tethininae as a subfamily. Canacidae wing veins-1

Family description

For terms see Morphology of Diptera. Minute (1.6–5 mm) yellow, grey or grey-brown pruinose flies with whitish to greyish markings. The head is large with small antenna bearing bare to pubescent arista. The "mouth" is a large oval opening. There are three or four pairs of orbital bristles on the head directed outward (inset upswept). Postvertical bristles are absent but diverging pseudopostocellar bristles are present. Other head bristles present are ocellar bristles, 2-5 pairs of frontal bristles, curving outward, interfrontal bristles and vibrissae ("whiskers"). The genae are high with 1 or more upcurving bristles.

Tibiae The tibia (; ), also known as the shinbone or shankbone, is the larger, stronger, and anterior (frontal) of the two bones in the leg below the knee in vertebrates (the other being the fibula, behind and to the outside of the tibia); it connects ...

are without a dorsal preapical bristle. The wing is unmarked in almost all species. The costa has a subcostal break; the subcosta is parallel to vein R1 and merging with that vein just before the costa. Tibiae without dorsal preapical bristle. Se

Drawings of ''Canace''.

Classification

Biology

Canacidae are mostly Intertidal zone, intertidal flies. They are found along sea coasts, on the surface of small water bodies, saline and fresh, at places protected from wind. They feed on Infusoria and other minute organisms.

References

External links

*http://www.diptera.info/downloads/Munari_Almeida_Andrade_2009.pdf Munari, Almeida, Andrade Description of a new species of ''Tethina'' Excellent photos.
Diptera.info
Images * Canacidae in Italian * Encyclopedia of Life World taxa list {{Taxonbar, from=Q140403 Brachycera families