Sinophaena xiweni, 2021

Lin, Yejie, Marusik, Yuri M., Gao, Caixia, Xu, Hao, Zhang, Xiaoqing, Wang, Ziyi, Zhu, Wenhui & Li, Shuqiang, 2021, Twenty-three new spider species (Arachnida: Araneae) from Asia, Zoological Systematics 46 (2), pp. 91-152 : 104-105

Diagnosis. S. xiweni Lin & Li , sp. nov. can be distinguished from S. bivalva (Zhang & Song, 2004) comb. nov. by the length ratio of the membrane to the diameter of the S, which is 2:1 (vs. 1: 1 in S. bivalva ) and by the length ratio of the S to the length of CDs, which is 1:1.3 (vs. 1: 1 in S. bivalva ).

Description. Female (holotype, IZCAS-Ar42407, Figs 11A–B , 14L ). Total length 7.62. Colour in alcohol: carapace, sternum, chelicerae, labium, endites, palps, and legs white with black pattern. Carapace 2.72 long, 1.96 wide. Opisthosoma 4.78 long, 1.62 wide. Fovea longitudinal. Eye sizes and interdistances: AME 0.08, ALE 0.15, PME 0.13, PLE 0.19, AME– AME 0.05, PME–PME 0.16, AME–PME 0.17, AME–ALE 0.05, PME–PLE 0.13, ALE–PLE 0.09. AER almost straight. Leg measurements: Leg I 14.21 (3.84 + 5.20 + 3.64 + 1.53), leg II 13.91 (3.72 + 5.10 + 3.64 + 1.45), leg III 6.90 (1.88 + 2.28 + 1.78 + 0.96), leg IV 11.70 (3.52 + 3.64 + 3.52 + 1.02). Leg formula 1243. Abdomen oval, spinnerets short and unsegmented.

Epigyne ( Figs 11A–B ) longer than wide, with a pair of tongue-shaped membranes. COs inconspicuous; CDs almost straight. AG distinct, at the middle of CDs. S large, oval.

Male. Unknown.

Material examined. Holotype ♀, China: Sichuan, Meishan, Hongya County, Xianwan Village , 24 March 2020, leg. Xiwen Chen (IZCAS-Ar42407).

Distribution. Known only from the type locality.

Etymology. The species is named after Mr. Xiwen Chen, the collector of the holotype; noun (name) in genitive case.

Figures

Figure 11. Sinophaena xiweni Lin & Li, sp. nov., holotype female. A. Epigyne, ventral view; B. Vulva, dorsal view. Scale bars = 0.1mm.

Figure 14. Habitus of six new Anyphaenidae species, male dorsal view (A, C, E, G, I), female dorsal view (B, D, F, H, J, K), and ventral view (L). A–B. Anyphaena grovyle Lin & Li, sp. nov.; C–D. A. sceptile Lin & Li, sp. nov.; E–F. A. shenzhen Lin & Li, sp. nov.; G–H. A. tibet Lin & Li, sp. nov.; I–J. A. treecko Lin & Li, sp. nov.; K–L. Sinophaena xiweni Lin & Li, sp. nov. Scale bars = 0.1mm.