Belisana xiangensis, Yao, Zhiyuan & Li, Shuqiang, 2013

Yao, Zhiyuan & Li, Shuqiang, 2013, New and little known pholcid spiders (Araneae: Pholcidae) from Laos, Zootaxa 3709 (1), pp. 1-51 : 27

publication ID	https://doi.org/ 10.11646/zootaxa.3709.1.1
publication LSID	lsid:zoobank.org:pub:496843C1-1D75-4B55-BFF2-370ECBAC11BB
DOI	https://doi.org/10.5281/zenodo.6158983
persistent identifier	https://treatment.plazi.org/id/03FE87D2-FFA7-FFE0-FF27-FE8C13010A13
treatment provided by	Plazi
scientific name	Belisana xiangensis
status	sp. nov.

Treatment

Belisana xiangensis View in CoL sp. nov.

Figs 22–24 View FIGURE 22 View FIGURE 23 View FIGURE 24 , 41 View FIGURE 41

Type material. Holotype: Male ( IZCAS), Tham Xiang [18°54.550′N, 102°26.527′E, alt. 270 m], 1.54 km south of Vieng keo Village, Vang Vieng District, Vien Tiane, Laos, 3 December 2012, leg. Z. Yao (Yao-LA 086). Paratypes: 1 male and 2 females ( IZCAS), same data as holotype.

Etymology. The specific name refers to the type locality; adjective.

Diagnosis. The species resembles B. leuser ( Huber 2005a: 62, figs 376–394), but can be distinguished by different shape of distal apophyses of male chelicerae ( Figs 23 View FIGURE 23 D and 24C), small membranous flap ( Figs 22 View FIGURE 22 B and 24B) and different position of pockets ( Figs 23 View FIGURE 23 A and 24D).

Description. Male (holotype): Total length 1.47 (1.56 with clypeus), prosoma 0.56 long, 0.63 wide, opisthosoma 0.91 long, 0.75 wide. Legs I, II and IV lost, leg III: 6.76 (1.95 + 0.25 + 1.60 + 2.41 + 0.55). Habitus as in Fig. 23 View FIGURE 23 E. Dorsal shield of prosoma and sternum whitish, without marks; ocular area with indistinct dark marks. Leg III yellowish, without darker rings. Opisthosoma yellowish, without spots. Distance PME-PME 0.11, diameter PME 0.07, distance PME-ALE 0.01, AME absent. Ocular area not elevated. Thoracic furrow absent. Sternum wider than long (0.50/0.44). Chelicerae as in Figs 23 View FIGURE 23 D and 24C, with a pair of thumb-shaped apophyses proximally and a pair of long, curved apophyses distally (distance between tips: 0.28). Pedipalpi as in Figs 22 View FIGURE 22 A–B and 24A–B; trochanter with a short retrolatero-ventral apophysis; femur with a dorsal apophysis; procursus simple proximally but complex distally, with a membranous flap retrolaterally and a bent spine; bulb with a hooked apophysis and a simple embolus.

Variation: Total length in another male: 1.47 (1.57 with clypeus); leg I lost.

Female: Similar to male, habitus as in Figs 23 View FIGURE 23 F–G. One of the specimens measured: Total length 1.69 (1.78 with clypeus), prosoma 0.59 long, 0.63 wide, opisthosoma 1.10 long, 0.73 wide; tibia I: 3.27 (leg I lost in another specimen). Distance PME-PME 0.12, diameter PME 0.08, distance PME-ALE 0.01, AME absent. Epigynum ( Figs 23 View FIGURE 23 A and 24D) simple and flat externally, with dark internal shade and a pair of pockets 0.29 apart. Vulva ( Figs 23 View FIGURE 23 B and 24E) with a wavy arch anteriorly and a pair of long, narrow pore plates. Retrolateral trichobothrium of tibia I at 18%; most hairs lost on legs.

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