calypter

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Related to Calypters: haltere

calypter

[kə′lip·tər]
(invertebrate zoology)
A scalelike or lobelike structure above the haltere of certain two-winged flies. Also known as alula; squama.
References in periodicals archive ?
Wing: Base black, basicosta grey-brown; costa setulose only basally on ventral surface, anterior surface with row of pectinate short spines, longest one equal to length of crossvein r-m; costal spine longer than crossvein r-m, radical node bare, calypters yellowish, lower about half length of upper one; halter brown-yellow.
0 times longer than posterior notopleural seta; katepisternal seta 1+2(3); costal spine longer than crossvein r-m, anterior surface with a row of pectinate short spines, longest one equal to length of crossvein r-m; calypters brown yellow, lower one about half longer than upper one; 5th sternite protruding slightly, inner side of lateral lobe with large process on distal 1/3; distiphallus distinctly sclerotized, and pregonite without setae.
15 Anterior katepisternal seta absent; lower calypter broad and truncated, of the Musca type (see couplet 6 for description); vein [R.