Belisana mengyang Yao & Li, 2020

Zhu, Wenhui, Yao, Zhiyuan, Zheng, Guo & Li, Shuqiang, 2020, Three new species of the spider genus Belisana Thorell, 1898 (Araneae: Pholcidae) from Xishuangbanna, Yunnan, China, Zootaxa 4742 (2), pp. 332-342 : 334-341

publication ID	https://doi.org/ 10.11646/zootaxa.4742.2.6
publication LSID	lsid:zoobank.org:pub:FB7C6E62-8F89-44E6-967D-1049BBD03C7E
DOI	https://doi.org/10.5281/zenodo.3684933
persistent identifier	https://treatment.plazi.org/id/0385475A-FFC6-FFDA-72D4-8C42FCBCFD18
treatment provided by	Plazi
scientific name	Belisana mengyang Yao & Li
status	sp. nov.

Treatment

Belisana mengyang Yao & Li View in CoL sp. nov.

Figs 5–6 View FIGURE 5 View FIGURE 6

Type material. Holotype: Male ( IZCAS Ar39748), seasonal rain forest (22°09’45.9”N, 100°52’33.2”E, elevation 862 ± 33 m), Mengyang County, Xishuangbanna , Yunnan, China, 22 July 2012, Q. Zhao and Z. Chen leg. GoogleMaps Paratypes: 5 males ( IZCAS Ar39749–Ar39753) and 2 females ( IZCAS Ar39754–Ar39755), same data as holotype GoogleMaps .

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

Diagnosis. This species resembles B. cas Yao & Li, 2018 (see Yao et al. 2018: 250, figs 7–8, 11D, 12D) with similar male chelicerae ( Fig. 6C View FIGURE 6 ) and bulbal apophyses ( Fig. 6D View FIGURE 6 ) but can be distinguished by presence of curved prolateral sclerite distally (arrow 1 in Fig. 5C View FIGURE 5 ) and large retrolateral membranous process distally (arrow 2 in Fig. 5C View FIGURE 5 ) on procursus, dorsally strongly protruding procursus (arrow in Fig. 5A View FIGURE 5 ), unmodified male pedipalpal coxa ( Fig. 5B View FIGURE 5 ). The female is recognised by presence of subcuticular teeth on epigynum ( Fig. 6A View FIGURE 6 ), slightly separated vulval pore plates ( Fig. 6B View FIGURE 6 ) and by absence of serrated sclerites on vulva ( Fig. 6B View FIGURE 6 ).

Description. Male (holotype). Total length 1.39 (1.48 with clypeus), carapace 0.53 long, 0.52 wide, opisthosoma 0.86 long, 0.55 wide. Leg I: 10.06 (3.60 + 0.31 + 1.40 + 2.25 + 2.50), leg II: 7.64 (2.50 + 0.31 + 2.19 + 1.88 + 0.76), leg III: 6.20 (1.60 + 0.31 + 1.25 + 2.50 + 0.54), leg IV: 8.60 (2.50 + 0.25 + 2.00 + 3.20 + 0.65); tibia I L/d: 39. Habitus as in Figs 6 View FIGURE 6 E–F. Carapace and sternum pale, without marks. Legs pale, without darker rings. Opisthosoma pale, without spots. Distance PME-PME 0.08, diameter PME 0.05, distance PME-ALE 0.03, AME absent. Ocular area not elevated. Thoracic furrow absent. Clypeus unmodified. Sternum approximately as wide as long (0.44). Chelicerae ( Fig. 6C View FIGURE 6 ) with pair of small proximo-lateral apophyses and pair of short distal apophyses (distance between tips: 0.14). Pedipalps as in Figs 5 View FIGURE 5 A–B; coxa unmodified; trochanter with short retrolatero-ventral apophysis (arrow in Fig. 5B View FIGURE 5 ); femur without dorsal apophysis proximally; procursus ( Figs 5 View FIGURE 5 A–D) simple proximally and complex distally, strongly protruding subdistally (arrow in Fig. 5A View FIGURE 5 ), with curved prolateral sclerite distally (arrow 1 in Fig. 5C View FIGURE 5 ) and large retrolateral membranous process distally (arrow 2 in Fig. 5C View FIGURE 5 ); bulb ( Fig. 6D View FIGURE 6 ) with hooked apophysis and simple embolus. Retrolateral trichobothria of tibia I at 23% proximally; legs with short vertical setae on metatarsi, without spines and curved setae; tarsus I with 12 distinct pseudosegments.

Female (IZCAS Ar39754): Similar to male, habitus as in Figs 6 View FIGURE 6 G–H. Total length 1.55 (1.65 with clypeus), carapace 0.67 long, 0.63 wide, opisthosoma 0.88 long, 0.65 wide; tibia I: 1.37; tibia I L/d: 35. Distance PME-PME 0.09, diameter PME 0.05, distance PME-ALE 0.03, AME absent. Sternum approximately as wide as long (0.56). Epigynum ( Fig. 6A View FIGURE 6 ) simple and flat, with pair of pockets 0.12 apart (ep in Figs 6 View FIGURE 6 A–B) and several subcuticular teeth. Vulva ( Fig. 6B View FIGURE 6 ) with curved anterior arch and pair of strongly curved pore plates.

Variation: Tibia I in four male paratypes (IZCAS Ar39749–Ar39752; leg I missing in IZCAS Ar39753): 1.33, 1.35, 1.37, 1.43. Tibia I in another female paratype (IZCAS Ar39755): 1.40.

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