Belisana gigantea sp. nov.

Figs 7–9, 41

Type material. Holotype: Male (IZCAS), underside of leaves [15°11.639′N, 106°06.222′E, alt. 909 m], Tad Etu, Champasak, Laos, 19 November 2012, leg. Z. Yao (Yao-LA 026–028). Paratype: 1 female (IZCAS), same data as holotype.

Etymology. The specific name is from Latin giganteus (of giants, large), in reference to the large membranous flap of procursus; adjective.

Diagnosis. The species can be easily distinguished from all known congeners by large membranous flap (Figs 7 B, D and 9B) and different shape of vulva (Figs 8 B and 9E).

Description. Male (holotype): Total length 1.58 (1.72 with clypeus), prosoma 0.56 long, 0.60 wide, opisthosoma 1.02 long, 0.62 wide. Leg I: 13.39 (3.25 + 0.29 + 3.36 + 5.32 + 1.17), leg II: 8.96 (2.45 + 0.23 + 2.17 + 3.30 + 0.81), leg III: 5.53 (1.63 + 0.22 + 1.25 + 1.91 + 0.52), leg IV: – (2.27 + 0.23 + 1.81 + 2.66 + –); tibia I L/ d: 54. Habitus as in Fig. 8 E. Dorsal shield of prosoma and sternum whitish, without marks; clypeus with an apophysis forward. Legs yellowish, but dark brown on patellae and tibia-metatarsus joints, without darker rings. Opisthosoma yellowish, with spots dorsally. Distance PME-PME 0.13, diameter PME 0.08, distance PME-ALE 0.02, AME absent. Ocular area not elevated. Thoracic furrow absent. Sternum wider than long (0.45/0.41). Chelicerae as in Figs 8 D and 9C, with a pair of thumb-shaped apophyses proximally provided with a small, round apophysis, and a pair of short, pointed apophyses distally (distance between tips: 0.06). Pedipalpi as in Figs 7 A–B and 9A–B; trochanter with a short retrolatero-ventral apophysis; femur with a dorsal apophysis; procursus simple proximally but complex distally, with a large membranous flap retrolaterally; bulb with a simple embolus. Retrolateral trichobothrium of tibia I at 13%; legs with short vertical hairs on metatarsi, without spines and curved hairs; tarsus I with about 10 distinct pseudosegments.

Variation: Unknown.

Female: Similar to male, habitus as in Figs 8 F–G. Total length 1.75 (1.84 with clypeus), prosoma 0.60 long, 0.63 wide, opisthosoma 1.15 long, 0.78 wide; leg I lost. Distance PME-PME 0.13, diameter PME 0.07, distance PME-ALE 0.02, AME absent. Epigynum (Figs 8 A and 9D) simple and flat externally, protrudent posteriorly, with dark internal shade and a pair of pockets 4 Μm apart. Vulva (Figs 8 B and 9E) with a ridge-shaped arch anteriorly and a pair of elliptic pore plates.

Distribution. Known only from the type locality (Fig. 41).