Belisana xiuwen Wang, S. Li & Yao 2024, sp. nov.

Belisana xiuwen Wang, S. Li & Yao sp. nov. Figs 12, 13, 22 K, L, 25 A, B Type material. Holotype: China • ♂; Guizhou, Guiyang, Xiuwen County, Liutong Town, Daxing Village, Duobing Cave; 27 ° 06.552 ' N, 106 ° 29.675 ' E; alt. 1035 m; 20 Apr. 2007; J. Liu & Y. Lin leg.; IZCAS - Ar 45214. Paratypes: China • 3 ♀; same data as for holotype; IZCAS - Ar 45215 –17. Diagnosis. The new species resembles B. yongcong sp. nov. (Figs 14, 15, 23 A, B, 25 C, D) by having similar male chelicerae (tips of distal apophyses widely separated and pointing inwards; Fig. 13 D), bulbal apophysis (hooked; Fig. 13 C), and epigyne (epigynal pockets on lateral part of epigynal plate, epigynal plate posteriorly curved; Figs 13 A, 25 A), but can be distinguished by procursus with distal spine (arrow 1 in Figs 12 C, 22 K vs absent) and without ventro-subdistal membranous lamella, prolatero-distal membranous lamella, and sclerotized dorso-subdistal apophysis (Figs 12 C, 22 K vs present), and by vulval pore plates long elliptic (3 × longer than wide, pp in Figs 13 B, 25 B vs curved and 9 ×). Description. Male (holotype): Total length 1.35 (1.48 with clypeus), prosoma 0.57 long, 0.59 wide, opisthosoma 0.78 long, 0.60 wide. Leg I: 10.06 (2.48, 0.21, 2.73, 3.36, 1.28), leg II: 6.94 (2.00, 0.22, 1.74, 2.18, 0.80), leg III: 5.08 (1.50, 0.20, 1.14, 1.64, 0.60), leg IV: 6.72 (1.94, 0.20, 1.72, 2.15, 0.71); tibia I L / d: 46. Eye interdistances and diameters: PME – PME 0.09, PME 0.05, PME – ALE 0.02. Sternum width / length: 0.45 / 0.40. Habitus as in Fig. 13 E, F. Dorsal shield of prosoma yellowish, without marks; clypeus and sternum yellowish. Legs whitish, without darker rings. Opisthosoma yellowish, without spots. Thoracic furrow absent. Clypeus unmodified. Eye pigments indistinct. Chelicerae with pair of proximo-lateral apophyses (pa in Fig. 13 D) and pair of curved distal apophyses (distance between tips: 0.30; da in Fig. 13 D). Palp as in Fig. 12 A, B; trochanter with ventral apophysis (as long as wide, arrow 1 in Fig. 12 B); femur with retrolatero-proximal protrusion (arrow 2 in Fig. 12 B); procursus simple, with distal spine (arrow 1 in Figs 12 C, 22 K) and retrolateral membranous flap (f in Figs 12 D, 22 L); bulb with hooked apophysis (ba in Fig. 13 C) and simple embolus (e in Fig. 13 C). Retrolateral trichobothria on tibia I at 6 % proximally; legs with short vertical setae on metatarsi; tarsus I with 15 distinct pseudosegments. Female (paratype, IZCAS - Ar 45215): Similar to male, habitus as in Fig. 13 G, H. Total length 1.75 (1.85 with clypeus), prosoma 0.56 long, 0.59 wide, opisthosoma 1.19 long, 0.80 wide; tibia I: 2.19; tibia I L / d: 44. Eye interdistances and diameters: PME – PME 0.09, PME 0.05, PME – ALE 0.02. Sternum width / length: 0.44 / 0.38. Epigyne simple and flat, posteriorly curved, with pair of lateral pockets 0.33 apart (ep in Figs 13 A, 25 A). Vulva with ridge-shaped anterior arch (aa in Figs 13 B, 25 B) and pair of long elliptic pore plates (3 × longer than wide, pp in Figs 13 B, 25 B). Variation. Tibia I in the other two female paratypes (IZCAS - Ar 45216 –17): 2.10, 2.18. 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.