cercus


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cercus

[′sər·kəs]
(invertebrate zoology)
Either of a pair of segmented sensory appendages on the last abdominal segment of many insects and certain other anthropods. Also known as cercopod.
References in periodicals archive ?
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.
9): anterior margin of sternite 8 slightly concave, posteromedian excavation V-shaped; sternite 10 elongate, with 7-8 pairs of setae; cercus short; two ovoid spermathecae, measuring 14 by 7.
I used MORPHOSYS to calculate these measures for each cercus [ILLUSTRATION FOR FIGURE 4 OMITTED].
2 Mesonotum mostly bare of microtomentum, shiny and with bicoloured pattern of dark brown and yellowish orange; cercus of [male] bearing 5 stout, tooth-like setae
Male terminalia (Figure 23): Gonocoxite splayed with mesobasal lobe; gonostylus elongate, striate, with reentrances, cercus secondarily lobed and smaller than hypoproct, hypoproct with parallel lobes, aedeagus triangular, elongate, tapering to the apex and longer than hypoproct.
Syntergosternite 7+8 orange-reddish, with golden microtomentum apically, having a marginal row of three pairs of strong setae and some smaller basally black hair-like setae; epandrium orange reddish with black hair-like setae; cercus sligthly curved forward with pointed apex in profile (Fig.
2 must have been identified using the criteria given by Ramme (1939; femoral armature and cercus shape in the male, femoral armature only in the female).
3): Epandrium about as long as wide, apically with 1 slender lateral process; surstylus wide, deeply bifurcated; cercus large with acute apex.
Cercus heavily sclerotised, somewhat arched dorsally; bearing several spine-like setae.
Cercus simple thick longer than supra anal plate slightly down curved, with sub acute apex, subgenital plate with sub acute apex.