Kaestneria bicultrata Chen & Yin, 2000,

Zhao, Qingyuan & Li, Shuqiang, 2014, A survey of linyphiid spiders from Xishuangbanna, Yunnan Province, China (Araneae, Linyphiidae), ZooKeys 460, pp. 1-181: 21-23

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Kaestneria bicultrata Chen & Yin, 2000


Taxon classification Animalia Araneae Linyphiidae

Kaestneria bicultrata Chen & Yin, 2000  Figs 47, 48, 49

Kaestneria bicultrata  : Chen and Yin 2000: 88, figs 17-20 (♀).

Material examined.

1♂, CHINA, Yunnan: Menglun Town: Xishuangbanna Nature Reserve, 21°54.718'N, 101°16.940'E, elevation ca 645 m, 5.-12.01.2007, secondary tropical seasonal rain forest, hand-collecting; 1♂, 21°54.646'N, 101°16.257'E, elevation ca 572 m, 5.-12.02.2007, rubber-tea plantation, hand-collecting; 1♂, 21°54.463'N, 101°15.978'E, elevation ca 569 m, 19.-25.02.2007, rubber-tea plantation, hand-collecting; 1♂1♀, 21°54.646'N, 101°16.257'E, elevation ca 572 m, 19.-26.05.2007, rubber-tea plantation, hand-collecting.


The female is easily recognized by the copulatory duct route and the finger-like spines on each side of the ventral fig ( Chen and Yin 2000: figs 18-19). The male is similar to Kaestneria pullata  O. P.-Cambridge, 1863 ( Roberts 1987: fig. 71b) and Kaestneria minima  Locket, 1982, but differs by the shape of paracymbium and embolic division (Fig. 47B, D). Both male and female differ from other congeners by having pattern on carapace and abdomen.


Female. Well described, e.g. by Chen and Yin (2000).

Male (one of males from Xishuangbanna). Total length: 1.78. Carapace 0.94 long, 0.64 wide, brown, with a pale stripe along the axis. Sternum 0.50 long, 0.45 wide. Clypeus 0.15 high. Chelicerae promargin with no teeth, retromargin with 1 tooth. Eye sizes and interdistances: AME 0.05, ALE 0.08, PME 0.07, PLE 0.06, AME-AME/AME 0.60, PME-PME/PME 0.43, AME-ALE/ALE 0.63, PME-PLE/PLE 0.67, coxae IV separated by 0.60 time their width. Lengths of legs: I 5.00 (1.30, 0.24, 1.28, 1.38, 0.80), II 3.14 (1.13, 0.20, 1.04, 1.13, 0.64), III 2.63 (0.76, 0.18, 0.56, 0.70, 0.43), IV 3.73 (1.10, 0.19, 0.88, 1.03, 0.53). Leg formula: I-IV-II-III. TmI 0.15, TmIV absent. Tibial spine formula: 2-2-2-2. Abdomen greenish brown, with white patches, same as the pattern in female holotype ( Chen and Yin 2000: fig. 17). Palp: tibia small, with one long, thick dorsal setae (Figs 47B, 48 A–B); paracymbium ‘V’ -shaped, basally somewhat rectangular, with a broad semi-circular tip (Fig. 47B); distal suprategular apophysis long, with a bifid apex, each embranchment blunt-ended, with rough surface (Figs 47B, 49B); lamella long and erect, terminating in a finger-like end (Fig. 47 C–D); median membrane long, broad, abruptly produced into a hooked tip (Fig. 47D); embolus simple, ribbon-like with a pointed tip (Fig. 47D).




Male of the species is reported for the first time.