Orchestina bialata Liu, Xiao & Xu 2016
Creators: name: Liu, Keke
name: Henrard, Arnaud
name: Xiao, Yonghong
name: Xu, Xiang
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Oonopidae
Orchestina
Orchestina bialata

description: Orchestina bialata Liu, Xiao & Xu, 2016
(Figures 6 −9, 16)
Orchestina bialata Liu, Xiao & Xu, 2016 (WSC 2019): 437– 439 f. 5A−G, 6A−F, 7A−D (description and illustration of female only).
Material examined: 7 females: China, Jiangxi Province: Ji’an City, Jinggangshan County Level City, Ciping Town, Huangyangjie, bamboo forest, 26.456°N, 114.106°E, 958m, 5.IV.2014, Zhiwu Chen, Keke Liu, Xiaoping Huang, Zeyuan Meng, and Yubao Tang leg. (OON 41); As previous, 7 males (OON 48); 7 females: China, Jiangxi Province: Ji’an City, Jinggangshan County Level City, Longshi Town, Yuankou Village, bamboo forest, 26.692°N, 113.953°E, alt. 265m, 1.V.2015, Zhiwu Chen, Keke Liu, ZeyuanMeng, Sha Wu, Shicong He and Yifan Zhao leg. (OON 55); As previous, 4 males (OON 59); 6 females: China, Jiangxi Province: Ji’an City, Jinggangshan County Level City, Maoping Town, Shenshan Village, Shenshan, bamboo forest, 26.637°N, 114.111°E, 1099m, 6.IV.2014, Keke Liu, Xiaoping Huang, Zhiwu Chen, Yubao Tang and Zeyuan Meng leg. (OON 65); 1 female, China, Jiangxi Province: Ji’an City, Jinggangshan County Level City, Ciping Town, Xiaojing Village, Longtan, 26.583°N, 114.135°E, 951m, 1. VI.2014, Keke Liu, Xiaoping Huang, Zhiwu Chen, Yubao Tang, Zeyuan Meng, and Zhanfeng Wang leg. (OON 66); 2 females: China, Jiangxi Province: Ji’an City, Jinggangshan County Level City, Maoping Town, Shenshan Village, Shenshan, bamboo forest, 26.640°N, 114.111°E, 1029m, 6.IV.2014, Keke Liu, Xiaoping Huang, Zhiwu Chen, Yubao Tang and Zeyuan Meng leg. (OON 68); 1 female: China, Jiangxi Province: Ji’an City, Jinggangshan County Level City, Maoping Town, Shenshan Village, Shenshan, bamboo forest, 26.637°N, 114.111°E, 1099m, 6.IV.2014, Keke Liu, Xiaoping Huang, Zhiwu Chen, Yubao Tang and Zeyuan Meng leg. (OON 69); As previous, 1 male (OON 70); 1 female: China, Jiangxi Province: Ji’an City, Jinggangshan County Level City, Ciping Town, Huangyangjie, bamboo forest, 26.623°N, 114.117°E, 1055m, 5.IV.2014, Zhiwu Chen, Keke Liu, Xiaoping Huang, Zeyuan Meng, and Yubao Tang leg. (OON 71); 1 female: China, Jiangxi Province: Ji’an City, Jinggangshan County Level City, Ciping Town, Dajing Village, Peak of Leaders, forest, 26.570°N, 114.121°E, 945m, 8.XII.2013, Zhiwu Chen, Keke Liu and Benqiang Xiao leg. (OON 72).
Diagnosis: Male of Orchestina bialata resembles those of O. aureola Tong & Li, 2011, O. clavulata Tong & Li, 2011, and O. sinensis Xu, 1987 in having an oval bulb and endites with the distal projection tapering anteriorly (see Tong & Li 2011: fig. 7A−D; Xu 1987: figs 5, 6). However, it can be distinguished from these species by the spadeshaped labium with a sclerotized, inverted Y-shaped pattern (Fig. 6F) (shortened hexagon without sclerotized pattern in O. aureola and O. clavulata: Tong & Li 2011: fig. 2A, B; liguliform without sclerotized pattern in O. sinensis Xu 1987: 257), the length and width ratio of the bulb (2.09 in Fig. 6B) (1.57 in O. aureola: Tong & Li 2011: fig. 6A; 1.20 in O. clavulata: Tong & Li 2011: fig. 7A; 1.22 in O. sinensis Xu 1987: fig. 5),the sperm duct with five circles visible in prolateral view (Fig. 7A) (three in O. aureola: Tong & Li 2011: fig. 6A; three in O. clavulata: Tong & Li 2011: fig. 7A; four in O. sinensis Xu 1987: fig. 5), and the embolus with few small teeth near distal end (Fig. 9G) (without small teeth in O. aureola, O. clavulata, and O. sinensis). For diagnosis of female, see Liu, Xiao and Xu (2016).
Description: Male (OON 48). Habitus as in Fig. 6A, B. Total length 1.21. Carapace (Fig. 6A, C−E), yellow, length 0.56, width 0.45, broadly oval in dorsal view (CW/CL ≈ 0.80), anteriorly narrowed to 0.5 times its maximum width, pars cephalica strongly elevated in lateral view, with scattered trichopores on surface. Eyes (Figs 6A, C−E, 8A, B): PME almost circular, touching; diameters:ALE 0.05, PME 0.06, PLE 0.06, PME 1.2 times ALE; ALE−PME touching, ALE−PLE touching, PLE−PME separated from less than PME radius. Clypeus (Figs 6A, C−E, 8A, B) vertical in lateral view, slightly sclerotized, with pair of setae on each rounded corner lying in front of ALE−PME junction. Sternum (Figs 6B, F, 8C) uniform yellowish-white, length equal to width, shield shaped, slightly sclerotized around margin, anteriorly with deep depression at base of endites and labium, with scattered trichopores on surface and few setae on posterior part. Mouthparts (Figs 6B, D−F, 8A−H): chelicerae yellow, straight, dorsally with few scattered, long setae, more numerous on inner margin, base of fang with fine setae in ventral view (Figs 6D, 8A, B, G); labium (Figs 6B, F, 8 C−F) spade-shaped, yellow-brown, more sclerotized than sternum, with central, inverted Y-shaped sclerotized pattern, with 10−12 setae on anterior margin, middle part with seven needle-like setae including three setae in center and two groups of two setae in lateral part, posterior part narrowed, fused to sternum; endites (Figs 6B, F, 8C, D, G, H) converging apically, distal half divided in two parts: one is a strongly sclerotized lateral prong with truncate tip and provided with strong serrula in single row; the other is median, membranous part with abundant, short, flattened setae on inner margin. Abdomen (Fig. 6A, B) oval, yellowish white, length 0.63, width 0.59, slightly elongated oval in dorsal view (AW/AL ≈ 0.94). Spinnerets (Fig. 6A, B) small, setae abundant on each spigot, circular dark bands interrupted ventrally, and with many trichopores around it. Legs yellow, femur IV thickened, wider than femora I−III, without spines. Genitalia (Figs 6 A−C, 7A−D, 9A−I): palp pale yellow, femur distally broadened, patella triangular, much shorter than femur, connected to tibia proximally; tibia enlarged (TW/ TLE ≈ 0.67), one to two times as wide as femur; cymbium ovoid, tapering apically, dorsally with numerous setae; bulb yellowish white, oval, strongly protruding posteriorly, narrowed apically; sperm duct strongly convoluted; embolus tube-shaped, strongly curved, proximal part swollen, tapered and darkened apically, sub-distally with few small teeth, with circular opening at tip.
Female: Described in Liu et al. (2016).
Distribution: Only known from Jiangxi Province (Fig. 16).
description: Published as part of Liu, Keke, Henrard, Arnaud, Xiao, Yonghong & Xu, Xiang, 2019, On three new oonopid species from China and the discovery of the male Orchestina bialata Liu, Xiao & Xu, 2016 (Araneae: Oonopidae), pp. 235-256 in Zootaxa 4701 (3) on pages 240-241, DOI: 10.11646/zootaxa.4701.3.2, http://zenodo.org/record/3558021