Poeciloneta duinanensis Xu, Irfan & Zhang, 2026, sp. nov.

Poeciloneta duinanensis sp. nov. Figs 1, 2, 5 A, 6 A – D, 7 Name in Chinese. 堆纳杂色皿蛛. Type material. Holotype • ♂; China, Xizang Autonomous Region, Yadong County, Duinan Township (grassland and walls along water’s edge), 27°58.555'N, 89°14.576'E, 4492 m a. s. l., 10 Jul. 2018, Luyu Wang, Zhisun Wu, and Yannan Mu leg. (SWUC -T-LIN-38-01). Paratypes: • 1 ♂ 13 ♀, same distribution data as holotype (SWUC -T-LIN-38-02 to 15). Etymology. This epithet derives from the type locality. Diagnosis. The male of Poeciloneta duinanensis sp. nov. resembles P. ancora, P. jidingensis sp. nov., and P. xizangensis in having a similar distal arm of the paracymbium (PC) and lamella characteristica (LC) with several branches (Figs 1 A – D, 3 A – D, 5 A, 5 B; Zhai and Zhu 2008: figs 5–7, 12–14), but it can be distinguished by the LC 2 tip, which has three teeth (vs seven teeth in P. jidingensis sp. nov. or bifurcated in both P. ancora and P. xizangensis; compare Fig. 1 C with Fig. 3 C, Zhai and Zhu 2008: figs 6, 13); LC 2 lateral projection tooth absent (vs present in P. jidingensis sp. nov.; Figs 1 A – D, 3 A – D, 5 A, 5 B)); tip of embolus proper (EP) bifurcated (vs not bifurcated; compare Fig. 1 C with Figs 3 C, 5 A, 5 B; figs 6, 13). The female of P. duinanensis sp. nov. resembles P. jidingensis sp. nov. and P. xizangensis in having a similar proscape (PS) (Figs 2 A – D, 4 A – D; Zhai and Zhu 2008: figs 2–4), but it can be distinguished by the posterior median plate (PMP), which is strongly depressed at the center and has the lateral margin rounded (vs trapezoid in P. jidingensis sp. nov. or slightly depressed at center and lateral margin angular in P. xizangensis; compare Fig. 2 D with Fig. 4 D, Zhai and Zhu 2008: fig. 3). Description. Male (holotype, Fig. 6 A, B): total length 2.43; carapace 1.19 long, 0.87 wide, yellowish brown; cephalic region slightly elevated; cervical and radial grooves distinct. Clypeus 0.19 high. Chelicerae with two promarginal and three retromarginal teeth. Sternum blackish brown, longer than wide, with microsetae. Eyes: AER recurved, PER straight, slightly wider than AER. Eye sizes and interdistances: AME 0.06, ALE 0.09, PME 0.09, PLE 0.09, AME – AME 0.03, PME – PME 0.05, AME – ALE 0.06, PME – PLE 0.06, AME – PME 0.09, ALE – ALE 0.40, PLE – PLE 0.42, ALE – PLE contiguous. Length of legs: I 5.14 (1.26, 0.34, 1.30, 1.35, 0.89), II 4.69 (1.21, 0.32, 1.21, 1.18, 0.77), III 3.59 (1.01, 0.27, 0.86, 0.89, 0.56), IV 4.75 (1.28, 0.31, 1.23, 1.22, 0.71). TmI 0.26. Tibial spine formula: 2-2 - 2 - 2. Opisthosoma 1.38 long, 0.80 wide, oval; dorsal side with greenish pattern extending laterally; lateral side with white patches; ventral side blackish brown with white patches. Pedipalp (Figs 1 A – D, 5 A). Patella two-thirds length of tibia, dorsally with a long, thick spine. Tibia conical, with two retrolateral and one dorsal trichobothria. Proximal cymbial apophysis (PCA) triangular, with blunt end. Paracymbium (PC) sclerotized, U-shaped; distal arm tip broadened with blunt end. Pit-hook (PH) relatively strong, sclerotized; distal end grooved. Lamella characteristica (LC) with two branches: LC 1 extending forward, with two long branches and an apical median tooth; LC 2 tip sclerotized, with three apical teeth; LC 2 lateral branch short, with a pointed end. Terminal apophysis (TA) distal end wavy, slightly curved. Embolus (E) long; embolus proper (EP) with bifurcated tip. Thumb (TH) sheet-like. Female (paratype, SWUC -T-LIN-38-02, Fig. 6 C, D): total length 3.26; carapace 1.54 long, 1.27 wide, cephalic region slightly elevated, brown, fovea, cervical and radial grooves distinct. Clypeus 0.25 high. Chelicerae with five promarginal and four retromarginal teeth. Sternum longer than wide, dark brown, with microsetae. Eyes: AER recurved, PER straight, slightly wider than AER. Eye sizes and interdistances: AME 0.07, ALE 0.12, PME 0.09, PLE 0.10, AME – AME 0.03, PME – PME 0.04, AME – ALE, 0.07, PME – PLE 0.09, AME – PME 0.11, ALE – ALE 0.47, PLE – PLE 0.49, ALE – PLE contiguous. Length of legs: I 6.10 (1.66, 0.46, 1.58, 1.46, 0.94), II 5.43 (1.53, 0.34, 1.39, 1.31, 0.86), III 4.33 (1.26, 0.36, 1.02, 1.10, 0.59), IV 5.75 (1.69, 0.41, 1.48, 1.41, 0.76). TmI 0.23. Tibial spine formula: 2-2 - 2 - 2. Opisthosoma 2.17 long, 1.33 wide, oval, all other characteristics same as in male. Epigyne (Fig. 2 A – D). Proscapus (PS) 1.5 wider than long; stretcher (St) longer than wide in dorsal view, with rounded end; lateral lobe (LL) ear-shaped. Posterior median plate (PMP) heart-shaped, with a round lateral margin. Copulatory opening (CO) present in lateral lobes at the middle of proscapus (PS), anteriorly. Spermathecae (S) tubular, slightly curved, pointing downward. Distribution. Known only from the type locality (Fig. 7).