calypter


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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 ?
0 times longer than broad; calypters brown; fore tibia with 2 medial p; mid femur with complete row of pv; mid tibia without av, 2 ad, row of short and seta-like pd and 2 strong pv; hind tibia with 7 av (3 short basally), row of ad (2-3 strong), row of pd (2 developed), and 6-7 pv on basal 3/5; distal part of inner margin of 5th sternite processes with 2 pairs of obtuse spines, and 1 pair of obtuse spines on margin of processes situated on the distal 1/3 of 5th sternite processes and 11-13 long setae on the distal part of lateral surface.
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.
25* as wide as high; arista plumose only on dorsal surface; palpus spatulate, slightly narrowed in basal 1/4 to 1/2 reaching tip of haustellum when proboscis flexed; presternum setulose; proepisternal depression and postalar wall bare; prealar seta differentiated or vestigial; lower calypter ca 2x as long as upper calypter.
Diagnosis: Body with strong bluish gloss; eye emarginate at middle of posterior margin; lower calypter white, with whitish border; male fore tarsi entirely black; mid femur with 1 or 2 setae near base.
Wing base light brown, vein brownish, basicosta dark brown, costal spine short and small, both surfaces of radial node with setulae, m-m cross vein lightly S-shaped, calypteres light brown, lower calypter with small lobule, inside it with 3-4 setulae in the middle; with anterior paracalyptral tuft, but without posterior paracalyptral tuft; halteres light brown.
Kirk-Spriggs, Malaise trap, remnant indigenous upland forest, BMSA(D)32693, two eggs inserted in left side of body: in eye and between two calypters.
Upper and lower calypters whitish, but the later with infuscated border.