Belisana bubeng Zhu & Li 2021, sp. nov.
Creators: name: Zhu, Wenhui
name: Li, Shuqiang
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Pholcidae
Belisana
Belisana bubeng

description: Belisana bubeng sp. nov.
Figs 1–2, 5 A–D
Type material. Holotype: Male (IZCAS Ar41821), seasonal rainforest (21°36’40.40”N, 101°34’25.60”E, elevation 855 ± 30 m), Bubeng Village, Mengla County, Xishuangbanna, Yunnan, China, 11 July 2012, Zhigang Chen & Qingyuan Zhao leg. Paratypes: 2 females (IZCAS Ar41822–41823), same data as holotype.
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) by having similar external female genitalia (Figs 2A, 5A) but females can be distinguished by the presence of a short scape (arrow s in Figs 2B, 5B) and narrow pore plates (arrow pp in Figs 2B, 5B) and by the absence of serrated sclerites on vulva. Males can be distinguished by the presence of a bifid subdisto-prolateral sclerite (arrow 1 in Figs 1C, 5C), nearly trapezoidal subdisto-ventral sclerite (arrow 2 in Figs 1C, 5C), curved subdisto-prolateral sclerite (arrow 3 in Figs 1C, 5C), fan-shaped disto-retrolateral membranous lamella (arrow 1 in Figs 1D, 5D), small disto-retrolateral sclerite (arrow 2 in Figs 1D, 5D) on the procursus, longer male cheliceral distal apophyses (arrow da in Fig. 2B), and by the presence of a long distal spine on the embolus (arrow in Fig. 2C).
Description. Male (holotype, IZCAS Ar41821): Total length 1.62 (1.70 with clypeus), carapace 0.79 long, 0.66 wide, opisthosoma 0.91 long, 0.69 wide. Leg I: – (1.78 + 0.28 + – + – + –), leg II: – (1.64 + 0.25 + 1.60 + 2.59 + –), leg III: 4.50 (1.34 + 0.16 + 1.09 + 1.44 + 0.47), femur IV: 1.68, other segments missing. Distance PME-PME 0.23, diameter PME 0.06, distance PME-ALE 0.07, AME absent. Sternum approximately as wide as long (0.50). Habitus as in Figs 2 E–F. Carapace pale, with brown lateral margins and small, brown median marks; sternum pale, without marks. Legs pale, without darker rings. Opisthosoma pale, without spots. Ocular area not elevated. Thoracic furrow absent. Clypeus unmodified. Chelicerae (Fig. 2D) with pair of small proximo-lateral apophyses and pair of long, curved distal apophyses, each with a sclerotized and pointed tip (distance between tips of distal apophyses: 0.23). Pedipalps as in Figs 1 A–B; coxa unmodified; trochanter with short ventral apophysis with small retrolateral apophysis (arrow 1 in Fig. 1B); femur with small proximo-dorsal apophysis (arrow 2 in Fig. 1B); procursus (Figs 1 A–D, 5C–D) simple proximally but complex distally, with bifid subdisto-prolateral sclerite (arrow 1 in Figs 1C, 5C), nearly trapezoidal subdisto-ventral sclerite (arrow 2 in Figs 1C, 5C), curved subdisto-prolateral sclerite (arrow 3 in Figs 1C, 5C), fan-shaped disto-retrolateral membranous lamella (arrow 1 in Figs 1D, 5D), and small distoretrolateral sclerite (arrow 2 in Figs 1D, 5D); bulb (Fig. 2C) with cone-shaped elongation, with distally sclerotized apophysis (arrow ba in Fig. 2C), and embolus with a long distal spine (arrow in Fig. 2C). Legs with short, vertical setae on metatarsi, without spines or curved setae.
Female (IZCAS Ar41822): Similar to male, habitus as in Figs 2 G–H. Total length 1.66 (1.74 with clypeus), carapace 0.78 long, 0.68 wide, opisthosoma 0.96 long, 0.73 wide. Tibia I: 2.44; tibia I L/d: 28. Distance PME-PME 0.24, diameter PME 0.06, distance PME-ALE 0.07, AME absent. Sternum approximately as wide as long (0.53). External female genitalia (Figs 2A, 5A) simple and flat, with pair of frontal “epigynal” pockets laterally on sclerotized plate (arrow ep in Figs 2 A–B, 5A–B), 0.21 apart. Vulva (Figs 2B, 5B) with a pair of long, narrow pore plates (arrow pp in Figs 2B, 5B), without serrated sclerites, and with short scape (arrow s in Figs 2B, 5B).
Natural history. The species was found in leaf litter and collected by small plot direct searching.
Variation: Tibia I in female paratype (IZCAS Ar41823): 2.24.
Distribution. China (Yunnan, type locality only; Fig. 6).
description: Published as part of Zhu, Wenhui & Li, Shuqiang, 2021, Two new spiders of the genus Belisana (Araneae: Pholcidae) from Xishuangbanna Rainforest, China, pp. 557-566 in Zootaxa 4933 (4) on pages 558-561, DOI: 10.11646/zootaxa.4933.4.6, http://zenodo.org/record/4556718