Shaanxinus micangshan Irfan, Rehman, Wang & Zhang, 2026, sp. nov.

Shaanxinus micangshan sp. nov. Figs 7 A – D, 8 A – E, 10 K – M, 11 Chinese name. 米仓山陕蛛. Type material. Holotype: • ♂, China: Sichuan Province, Nanjiang County, Micang Mountain, Daxiaolangou, 32°39.981'N, 106°54.759'E, alt. 1368 m, Jiang Xuankong, Wang Dong leg. (SWUC -T-LIN-43-01). Paratypes • (3 ♂ 3 ♀): 1 ♀, same data as holotype male (SWUC -T-LIN-43-02); • 3 ♂ 1 ♀, Aba Tibetan and Qiang Autonomous Prefecture, Li County, Shangmeng Township, Mengdonggou, 31°42'35.20"N, 103°7'51.16"E, alt. 2511 m, 2026-06-15, Muhammad Irfan, Cai Yujun, Tehreem Rehman, Shang Junxuan, and Zhou Hanping leg. (SWUC -T-LIN-43-03 – 06); • 1 ♀, Kangding City, Kongyu Township, Selong Village, 30°33'0.0600"N, 102°5'2.5740"E, alt. 2480.3 m, 2026-08-05, Muhammad Irfan, Cheng Linxin, Tehreem Rehman and Zhou Hanping leg. (SWUC -T-LIN-43-07). Etymology. The specific epithet is derived from the type locality. Diagnosis. Male of Shaanxinus micangshan sp. nov. resembles S. liangdang sp. nov. in having a similar embolic division (Figs 7 A, 5 A), but it can be distinguished by having the anterior radical apophysis tip with a triangular projection (Fig. 7 B), vs without a projection in S. liangdang sp. nov. (Fig. 5 B), the distal arm of the paracymbium covering half of the proximal part and the tip margin straight in retrolateral view (Fig. 7 B), vs the distal arm covering more than half of the proximal part and the tip tapering in S. liangdang sp. nov. (Fig. 5 B). The epigyne of S. micangshan sp. nov. can be distinguished from that of all other congeners by the balloon-shaped proximal part of the copulatory ducts and the ventrally grooved dorsal plate (Fig. 8 A, C). Description. Male (holotype, Fig. 10 K, L): total length: 3.31. Carapace 1.48 long, 1.23 wide, yellowish brown, cephalic lobe 0.51 high with many microsetae; sulci present below the anterior eye row; fovea, cervical and radial grooves distinct. Clypeus 0.45 high. Chelicerae with 5 promarginal and 4 retromarginal teeth. AER strongly recurved, PER straight, slightly wider than AER. Eye sizes and interdistances: AME 0.06, ALE 0.05, PME 0.06, PLE 0.06, AME – AME 0.07, PME – PME 0.08, AME – PME 0.11, AME – ALE 0.04, PME – PLE 0.05, ALE – ALE 0.26, PLE – PLE 0.31, ALE – PLE 0.03. Length of legs: I 5.44 (1.59, 1.85, 1.32, 0.68), II 5.87 (1.63, 1.96, 1.56, 0.72), III 4.65 (1.35, 1.42, 1.31, 0.57), IV 6.07 (1.79, 1.99, 1.58, 0.71). Leg IV longer than II. TmI 0.37. Tibial spine formula: 2-2 - 2 - 2. Abdomen 1.94 long, 0.99 wide, oval, grey, blackish pattern followed by five transverse chevrons, ventral side grey. Pedipalp (holotype, Fig. 7 A – D). Patella 2 / 3 length of tibia, ventrally grooved. Tibia long, with 2 retrolateral and 1 dorsal trichobothria, medially with long, thick spines. Paracymbium U-shaped, distal arm covers half of proximal part in retrolateral view, tip margin straight. Tegulum extending retrolaterally, with membranous protegulum. Distal suprategular apophysis disc-shaped, with tapering tip. Radix with membranous anterior radical process; lateral extension of radix slightly curved, ventrally grooved, wrapping embolus, triangular projection with apical pointed end; tailpiece triangular, with pointed end; median membrane present; embolus sclerotised, arc-shaped, terminal part ends in tip of lateral extension of radix. Female (paratype, Fig. 10 M): total length: 3.37. Carapace 1.47 long, 1.04 wide. Clypeus 0.31 high. Chelicerae with 6 promarginal and 5 retromarginal teeth. AER recurved, PER procurved, slightly wider than AER. Eye sizes and interdistances: AME 0.05, ALE 0.07, PME 0.07, PLE 0.07, AME – AME 0.05, PME – PME 0.09, AME – PME 0.07, AME – ALE 0.04, PME – PLE 0.04, ALE – ALE 0.34, PLE – PLE 0.41, ALE – PLE 0.01. Length of legs: I 5.05 (1.51, 1.72, 1.24, 0.58), II 5.23 (1.56, 1.84, 1.25, 0.58), III 3.62 (1.11, 1.11, 0.99, 0.41), IV 4.73 (1.31, 1.51, 1.35, 0.56). TmI 0.23. Abdomen 2.15 long, 1.41 wide. All other morphological characters same as in the male, except for the pale colour. Epigyne (Fig. 8 A – E). Epigynal plate wider than long. Ventral plate not extended posteriorly. Dorsal plate visible, ventrally grooved, posterior margin wavy. Copulatory openings situated anteriorly beneath ventral plate. Vulva: copulatory ducts anteriorly forming broad, balloon-like loop, then turning dorsally. Spermathecae globular, dorso-lateral, separated by twice their diameter; fertilisation ducts large, mesally extending. Distribution. Known only from the type locality (Fig. 11).