Belisana mengla Zhu & Yao & Zheng & Li 2020, sp. nov.

Belisana mengla Yao & Li sp. nov.

Figs 1–2

Type material. Holotype: Male (IZCAS Ar39745), Xiaolongha Village, (21°24’19.8”N, 101°37’01.3”E, elevation 801 ± 22m), Mengla County, Xishuangbanna, Yunnan, China, 30 June 2012, Q. Zhao and Z. Chen leg. Paratype: 1 female (IZCAS Ar39746), same data as holotype.

Etymology. The specific name refers to the type locality and is a noun in apposition.

Diagnosis. This species resembles B. yangxiaodongi Yao & Li, 2018 (see Yao et al. 2018: 255, figs 9– 10, 11E, 12E) with similar male chelicerae (Fig. 2D), bulbal apophyses (Fig. 2C) and vulva (Fig. 2B) but can be distinguished by presence of dorsal apophysis proximally on pedipalpal femur (arrow in Fig. 1A), absence of spine distally and membranous flap retrolaterally on procursus (Figs 1 A–D), presence of angular distal sclerite retrolaterally (arrow 1 in Fig. 1D) and large, flat, distal membranous lamella (arrow 2 in Fig. 1D) on procursus, and by presence of subcuticular teeth on epigynum (Fig. 2A).

Description. Male (holotype): Total length 1.50 (1.61 with clypeus), carapace 0.73 long, 0.63 wide, opisthosoma 0.77 long, 0.56 wide. Leg I: 11.32 (3.80 + 0.40 + 2.64 + 3.36 + 1.12), leg II: — (2.19 + 0.31 + 2.00 + 2.91 + –), leg III missing, leg IV: — (2.10 + 0.50 + 1.75 + 2.35 + –); tibia I L/d: 42. Habitus as in Figs 2 E–F. Carapace and sternum pale, without marks. Legs pale, without darker rings. Opisthosoma pale, without spots. Distance PME- PME 0.13, diameter PME 0.08, distance PME-ALE 0.03, AME absent. Ocular area not elevated. Thoracic furrow absent. Clypeus unmodified. Sternum approximately as wide as long (0.64). Chelicerae (Fig. 2D) with pair of small proximo-lateral apophyses and pair of long, curved distal apophyses each provided with modified seta on its tip (distance between tips: 0.42). Pedipalps as in Figs 1 A–B; coxa unmodified; trochanter with very short retrolateroventral apophysis (arrow in Fig. 1B); femur with small dorsal apophysis proximally (arrow in Fig. 1A); procursus (Figs 1 A–D) simple proximally but complex distally, with angular distal sclerite retrolaterally (arrow 1 in Fig. 1D) and large, flat, distal membranous lamella (arrow 2 in Fig. 1D); bulb (Fig. 2C) with hooked apophysis and wide embolus. Retrolateral trichobothria of tibia I at 13% proximally; legs with short vertical setae on metatarsi, without spines and curved setae; tarsus I with 17 distinct pseudosegments.

Female (IZCAS Ar39746): Similar to male, habitus as in Figs 2 G–H. Total length 1.40 (1.52 with clypeus), carapace 0.68 long, 0.56 wide, opisthosoma 0.72 long, 0.68 wide; tibia I: 1.42; tibia I L/d: 37. Distance PME-PME 0.14, diameter PME 0.08, distance PME-ALE 0.03, AME absent. Sternum approximately as wide as long (0.58). Epigynum (Fig. 2A) simple and flat, with pair of pockets 0.47 apart (ep in Figs 2 A–B) and several subcuticular teeth. Vulva (Fig. 2B) with ridge-shaped anterior arch and pair of narrow, curved pore plates far apart.

Distribution. China (Yunnan, type locality; Fig. 7).