cercus


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cercus

 [ser´kus]
a bristle-like structure.

cer·cus

, gen. and pl.

cer·ci

(ser'kŭs, ker'kŭs),
1. A stiff hairlike structure.
2. A pair of specialized sensory appendages on the 11th abdominal segment of most insects.
[Mod. L., fr. G. kerkos, tail]

cercus

(sûr′kəs, kĕr′-)
n. pl. cerci (sûr′sī, -kī, kĕr′kē)
Either of a pair of appendages located near the tip of the abdomen in many insects and certain other arthropods, usually having a sensory function.

cer·cus

, gen. and pl. cerci (ser'kŭs, ser'sī)
A stiff hairlike structure.
[Mod. L., fr. G. kerkos, tail]
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References in periodicals archive ?
Epiphallus reduced; cercus in profile anteriorly almost entirely straight and gently curved backward subapically, with anterior protuberance between cerci in the midlength small, posteriorly slightly concave at midlength and rounded subapically; cerci in posterior view subtriangular, with lateral edges almost in a straight line.
22-25): gonocoxite and gonostylus cylindrical and very long, the former completely covered with setae, and the latter setulose basally, carinate beyond; with small tooth apically; hypoproct unilobed, longer and narrower than cercus, with pair of setae at apex; parameres bilobed, longer than hypoproct, covered with microsetae at apex of each lobe and with basal lobe on each side, aedeagus cylindrical, longer than parameres and narrower than cercus.
terrea in having the integument strongly granulated and tuberculate, body greenish mottled with dark brown; median inner area of hind femur greenish, fastigium of vertex without apical furrow, cercus almost as long as the paraproct in female, ventral aedeagal valves dorsally flattened and curved outwards, lophi lobiform but wide.
16): Gonocoxites narrow and with mesobasal lobe rounded and discrete, with setae placed only on external surface; gonostylus clavate, shorter than gonocoxite and sparsely covered with setae and microsetulae, group of 8 sensillae at basal region; gonostylus teeth entire and discrete; cercus bilobed and triangular-shape with straight apex; hypoproct deeply bilobed and setose, with apex rounded; each lobe with few strong setae at tip; parameres absent, aedeagus wide and elongated; rounded at apex and 1.5 longer than hypoproct.
--Mesonotum invested with microtomentum, appearing somewhat dull, mostly unicolourous; cercus of [male] bearing several long setulae, especially posteriorly, but
Epandrium with 4 strong, long black setae; surstylus with upper blade of bifurcated tip swollen, the lower one slightly swollen and shorter than upper one; cercus arched with ventral appendix.
Remarks: This genus is assigned to the subfamily Trichopezinae on the basis of the presence of an internal apodeme arising from the anterior margin of the female tergite 8, in addition to female tergite and sternite 8 articulated anteroventrally, female cercus heavily sclerotised and female tergite 7 with fringe of setae along posterior margin (as in Fig.
Matt, right after it was caught by the latter in December 1997 at the same site at a slightly lower elevation: this specimen's remains were used for drawings of the cercus (Fig.
141); base of surstylus with a few scattered black setulae, shorter than width of cercus (Figs 144, 145) ...