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 ?
Calypteres with dark edge; lower calypter with lobular internal margin, not directed towards the scutellum.
9-15) differing by the lower calypter with lobular internal margin, not directed towards the scutellum; calypters with dark edge; surstyli in lateral view slightly curved and apical tip of paraphallus with dorsal line of denticles.
DISCUSSION: This new species is closely related to Delia atrifrons Fan 1981, but differs from it in many features: male prementum about 3.0 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.
--Lower calypter of the Phaonia-type, i.e., inner margin diverging immediately and at right-angles from supra-squamal ridge; tongue-like in shape ...
15 Anterior katepisternal seta absent; lower calypter broad and truncated, of the Musca type (see couplet 6 for description); vein [R.sub.4+5] without dorsal setulae; 1 species ...
Base slightly brown; basicosta black, without costal spine, both surfaces of radial node with setae, m-m crossvein S-shaped, calypteres dark brown, lower calypter with small lobule, inside it with few setae in the middle; with anterior paracalyptral tuft, but without posterior paracalyptral tuft; halteres brownish-yellow.
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.
--Upper and lower calypters yellow or light yellow with very short hairs of the same colour on margin; abdomen not as above; the longest mid tibial anterodorsal seta about one-third length of tibia ...
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.
The member of the family can be recognized by the following combination of characters: lower calypters glossiform or ovate, diverging from scutellum; posterior spiracle triangular without a distinct operculum, with both anterior and posterior fringes reduced; subscutellum distinctly developed, but not strongly developed as in Tachinidae.