Belisana nayong Wang, S. Li & Yao sp. nov.

Figs 8, 9, 22 G, H, 24 G, H

Type material.

Holotype: China • ♂; Guizhou, Bijie, Nayong County, Laosiba Town, Bailong Cave; 26 ° 50.166 ' N, 105 ° 31.222 ' E; alt. 1468 m; 27 Apr. 2007; J. Liu & Y. Lin leg.; IZCAS - Ar 45198 . Paratypes: China • 3 ♂; same data as for holotype; IZCAS - Ar 45199 –201 • 4 ♀; same data as for holotype; IZCAS - Ar 45202 –05 .

Diagnosis.

The new species resembles B. yongcong sp. nov. (Figs 14, 15, 23 A, B, 25 C, D) by having similar bulbal apophysis (hooked; Fig. 9 C) and vulva (anterior arch ridge-shaped, pore plates curved, long elliptic and 8 × longer than wide; Figs 9 B, 24 H), but can be distinguished by procursus with pointed ventro-subdistal membranous process (arrow 1 in Figs 8 C, 22 G vs blunt), by male cheliceral distal apophyses pointing inwards (da in Fig. 9 D vs outwards), and by epigyne with postero-median pockets (ep in Figs 9 A, 24 G vs lateral).

Description.

Male (holotype): Total length 2.33 (2.50 with clypeus), prosoma 0.86 long, 0.89 wide, opisthosoma 1.47 long, 1.15 wide. Leg I: 31.51 (8.33, 0.42, 7.82, 13.08, 1.86), leg II missing, leg III: 19.77 (5.08, 0.39, 5.04, 7.88, 1.38), leg IV missing; tibia I L / d: 89. Eye interdistances and diameters: PME – PME 0.10, PME 0.10, PME – ALE 0.02. Sternum width / length: 0.68 / 0.64. Habitus as in Fig. 9 E, F. Dorsal shield of prosoma yellowish, with brown radiating marks; clypeus brown; sternum yellowish. Legs whitish, without darker rings. Opisthosoma yellowish, without spots. Thoracic furrow absent. Clypeus unmodified. Chelicerae with pair of proximo-lateral apophyses (pa in Fig. 9 D) and pair of curved distal apophyses (distance between tips: 0.02; da in Fig. 9 D). Palp as in Fig. 8 A, B; trochanter with ventral apophysis (as long as wide, arrow 1 in Fig. 8 B); femur with retrolatero-proximal protrusion (arrow 2 in Fig. 8 B); procursus simple proximally but complex distally, with ventro-subdistal membranous process (arrow 1 in Figs 8 C, 22 G), prolatero-distal membranous lamella (arrow 2 in Figs 8 C, 22 G) bearing proximally sclerotized part, dorso-distal spine (arrow 3 in Figs 8 C, 22 G), and retrolateral membranous flap (f in Figs 8 D, 22 H); bulb with hooked apophysis (ba in Fig. 9 C) and simple embolus (e in Fig. 9 C). Retrolateral trichobothria on tibia I at 4 % proximally; legs with short vertical setae on metatarsi; tarsus I with 18 distinct pseudosegments.

Female (paratype, IZCAS - Ar 45202): Similar to male, habitus as in Fig. 9 G, H. Total length 2.47 (2.67 with clypeus), prosoma 0.81 long, 0.88 wide, opisthosoma 1.66 long, 1.40 wide; tibia I: 4.65; tibia I L / d: 58. Eye interdistances and diameters: PME – PME 0.11, PME 0.10, PME – ALE 0.02. Sternum width / length: 0.68 / 0.64. Epigyne simple and flat, posteriorly curved, with pair of postero-median pockets 0.02 apart (ep in Figs 9 A, 24 G). Vulva with ridge-shaped anterior arch (aa in Figs 9 B, 24 H) and pair of curved, long elliptic pore plates (8 × longer than wide, pp in Figs 9 B, 24 H).

Variation.

Tibia I in three male paratypes (IZCAS - Ar 45199 –201): 6.15, 6.35, 6.50. Tibia I in the other three female paratypes (IZCAS - Ar 45203 –05): 4.45, 4.50, 4.74.

Habitat.

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

Distribution.

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

Etymology.

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