Belisana langping Zhang, Li & Yao sp. nov.

Figs 2, 3, 8 A, B, 9 A, B

Type material.

Holotype: China • ♂; Guangxi, Baise, Tianlin County, Langping Town, Dabao Village, Sanchuantun, Papa Cave; 24 ° 34.226 ' N, 106 ° 13.675 ' E; alt. 773 m; 14 Aug. 2011; C Wang leg.; IZCAS - Ar 44988 . Paratypes: China • 4 ♀; same data as for holotype; IZCAS - Ar 44989 –92 .

Etymology.

The specific name refers to the type locality; noun in apposition.

Diagnosis.

The new species resembles B. phungae Yao, Pham & Li, 2015 (Yao et al. 2015: 9, figs 19 A – D, 20 A – G, 21 A – E) by having similar male chelicerae and epigyne (Fig. 3 A, D), but can be distinguished by procursus with retrolatero-subdistal membranous lamella (arrow in Figs 2 D, 8 B vs. absent in B. phungae), by bulbal apophysis hooked (ba in Fig. 3 C vs. distally blunt in B. phungae), by cheliceral proximo-lateral apophyses and distal apophyses closer to each other (Fig. 3 D vs. widely separated in B. phungae), by vulva without sac-like structure (Figs 3 B, 9 B vs. present in B. phungae), and by pore plates nearly triangular (pp in Figs 3 B, 9 B vs. nearly round in B. phungae); also distinguished from B. zhangi Tong & Li, 2007 (Tong and Li 2007: 505, figs 1–6) by procursus with sclerotized prolatero-subdistal apophysis (arrow 1 in Figs 2 C, 8 A vs. spine in B. zhangi), prolatero-subdistal membranous lamella (arrow 2 in Figs 2 C, 8 A vs. absent in B. zhangi), and retrolatero-subdistal membranous lamella (arrow in Figs 2 D, 8 B vs. retrolatero-ventral in B. zhangi), by procursus without retrolateral membranous flap (Figs 2 D, 8 B vs. present in B. zhangi), by vulval anterior arch straight (aa in Figs 3 B, 9 B vs. ridge-shaped in B. zhangi), and by pore plates nearly triangular (pp in Figs 3 B, 9 B vs. long and curved in B. zhangi).

Description.

Male (holotype): Total length 1.11 (1.20 with clypeus), prosoma 0.40 long, 0.53 wide, opisthosoma 0.71 long, 0.54 wide. Leg I missing, leg II: 4.88 (1.30, 0.20, 1.18, 1.62, 0.58), leg III: 3.92 (1.00, 0.19, 0.96, 1.27, 0.50), leg IV: 4.76 (1.27, 0.20, 1.17, 1.55, 0.57). Eye interdistances and diameters: PME – PME 0.10, PME 0.06, PME – ALE 0.02, AME absent. Sternum width / length: 0.43 / 0.33. Habitus as in Fig. 3 E, F. Dorsal shield of prosoma yellowish, with indistinct median and posterior marks; sternum yellowish, with indistinct marginal marks. Legs whitish, without darker rings. Opisthosoma yellowish, without spots. Thoracic furrow absent. Clypeus unmodified. Chelicerae with pair of proximo-lateral apophyses (pa in Fig. 3 D) and pair of distal apophyses (da in Fig. 3 D; distance between tips: 0.11). Palp as in Fig. 2 A, B; trochanter with ventral apophysis (arrow in Fig. 2 B); procursus simple proximally but complex distally, with sclerotized prolatero-subdistal apophysis (arrow 1 in Figs 2 C, 8 A), prolatero-subdistal membranous lamella (arrow 2 in Figs 2 C, 8 A), and retrolatero-subdistal membranous lamella (arrow in Figs 2 D, 8 B); bulb with hooked apophysis (ba in Fig. 3 C) and simple embolus (e in Fig. 3 C).

Female (paratype, IZCAS - Ar 44989): Similar to male, habitus as in Fig. 3 G, H. Total length 1.57 (1.66 with clypeus), prosoma 0.43 long, 0.56 wide, opisthosoma 1.14 long, 0.90 wide. Leg I: 6.87 (1.86, 0.24, 1.78, 2.16, 0.83); tibia I L / d: 36. Eye interdistances and diameters: PME – PME 0.06, PME 0.05, PME – ALE 0.02, AME absent. Sternum width / length: 0.40 / 0.33. Epigyne simple and flat, with pair of median pockets 0.08 apart (ep in Figs 3 A, 9 A). Vulva with straight anterior arch (aa in Figs 3 B, 9 B) and pair of nearly triangular pore plates (pp in Figs 3 B, 9 B). Retrolateral trichobothria on tibia I at 5 % proximally; legs with short vertical setae on metatarsi; tarsus I with 16 distinct pseudosegments.

Variation.

Tibia I in other three female paratypes (IZCAS - Ar 44990 –92): 1.80, 1.93, 1.98.

Habitat.

The species was found in the dark zone inside the cave.

Distribution.

China (Guangxi, type locality; Fig. 1).