Belisana gyirong Zhang, Zhu & Song 2006
Creators: name: Zhu, Wenhui
name: Yao, Zhiyuan
name: Zheng, Guo
name: Li, Shuqiang
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Pholcidae
Belisana
Belisana gyirong

description: Belisana gyirong Zhang, Zhu & Song, 2006   
Figs 1–2, 11 A–B  
 Belisana gyirong Zhang, Zhu & Song 2006: 200, figs 25–31.   
 Material examined. 2 males (IZCAS Ar39796–39797) and 2 females (IZCAS Ar39798–39799), Chongse Village (28°23'42.02"N, 85°21'28.67"E, elevation 2801 m), Gyirong Town, Gyirong County, Xigaze, Tibet, China, 25 July 2017, X. Zhang and Z. Bai leg.   
 Diagnosis. This species resembles B. zham sp. nov. (Figs 9–10, 11 G–H) with similar bulbal apophyses (Fig. 2C) and vulval pore plates (Figs 2B, 11B), but can be distinguished by presence of large retrolateral membranous flap (arrow f in Fig. 1D), small, disto-dorsal membranous lamella (arrow 1 in Fig. 1C) and small, disto-ventral membranous process (arrow 2 in Fig. 1C) on procursus. Compared with B. zham sp. nov., distal apophyses of male chelicerae (arrow da in Fig. 2D) are closer, and epigynal pockets (arrow ep in Figs 2 A–B, 11A–B) are more separated.   
 Redescription. Male (IZCAS Ar39796). Total length 2.35 (2.41 with clypeus), carapace 1.10 long, 0.83 wide, opisthosoma 1.25 long, 1.12 wide. Leg I: 21.73 (5.19 + 0.38 + 5.58 + 8.72 + 1.86), leg II: 14.40 (3.97 + 0.37 + 3.78 + 5.45 + 0.83), leg III: 9.87 (2.87 + 0.22 + 2.25 + 3.72 + 0.81), leg IV: 11.67 (3.59 + 0.26 + 2.82 + 4.04 + 0.96); tibia I L/d: 70. Habitus as in Figs 2 E–F. Carapace pale, with pair of large brown marks; ocular area and clypeus brown; sternum pale, without marks. Legs pale, without darker rings. Opisthosoma pale, with black spots dorsally and laterally. Distance PME-PME 0.10, diameter PME 0.07, distance PME-ALE 0.04, AME absent. Ocular area not elevated. Thoracic furrow absent. Clypeus unmodified. Sternum slightly wider than long (0.68/0.63). Chelicerae (Fig. 2D) with pair of small proximo-lateral apophyses and pair of short, curved distal apophyses each with hardened and pointed tip (distance between tips: 0.16). Pedipalps as in Figs 1 A–B; coxa unmodified; trochanter with short retrolatero-ventral apophysis; femur with small proximo-dorsal apophysis (arrow in Fig. 1B); procursus (Figs 1 A–D) curved (arrow in Fig. 1A), complex distally, with membranous elements, long distal spine and large, retrolateral membranous flap (arrow f in Fig. 1D); bulb (Fig. 2C) with long hooked apophysis and long embolus. Retrolateral trichobothria of tibia I at 5% proximally; legs with short vertical setae on metatarsi, without spines or curved setae; tarsus I with 24 distinct pseudosegments.   
 Female (IZCAS Ar39798): Similar to male, habitus as in Figs 2 G–H. Total length 2.30 (2.44 with clypeus), carapace 0.89 long, 0.81 wide, opisthosoma 1.41 long, 0.97 wide. Tibia I: 3.78; tibia I L/d: 47. Distance PME-PME 0.11, diameter PME 0.06, distance PME-ALE 0.04, AME absent. Sternum slightly longer than wide (0.63/0.58). External female genitalia (Figs 2A, 11A) simple and flat, with pair of pockets 0.10 apart (ep in Figs 2 A–B, 11A–B). Vulva (Figs 2B, 11B) with slightly curved anterior arch and pair of elliptic pore plates.   
 Variation: Tibia I in another male (IZCAS Ar39797): 4.49. Tibia I in another female (IZCAS Ar39799): 2.56.   
 Natural history. The species was found on the underside of rocks.   
 Distribution. China (Tibet, Gyirong County, Gyirong Town. Fig. 12; the same as type locality see Zhang et al. 2006).
description: Published as part of Zhu, Wenhui, Yao, Zhiyuan, Zheng, Guo & Li, Shuqiang, 2020, The Belisana spiders (Araneae: Pholcidae) from Tibet, China, pp. 111-128 in Zootaxa 4802 (1) on pages 112-115, DOI: 10.11646/zootaxa.4802.1.7, http://zenodo.org/record/3904926