Survey of Linyphiidae (Arachnida: Araneae) spiders from Yunnan, China Author Irfan, Muhammad 0000-0003-0445-9612 College of Life Sciences, Hunan Normal University, Changsha, 410081, China Author Zhang, Zhi-Sheng 0000-0002-9304-1789 Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), School of Life Sciences, Southwest University, Chongqing 400715, China. Author Peng, Xian-Jin 0000-0002-2614-3910 College of Life Sciences, Hunan Normal University, Changsha, 410081, China text Megataxa 2022 2022-12-27 8 1 1 292 http://dx.doi.org/10.1094/PDIS-04-22-0755-PDN journal article 10.11646/megataxa.8.1.1 2703-3090 7526571 Linyphia pengdangensis sp. nov. (ǾṦƉƦ) Figures 177 , 180 Types. Holotype ♀ , CHINA , Yunnan , Gongshan County , Pengdang Village , Jimudeng hamlet, 27.54197°N , 98.39340°E , alt. 1573m , 6 October 2002 , Chang-min Yin and Xiang Xu leg. (No. 16). Etymology. This epithet derives from the type locality. Diagnosis. The new species resembles Linyphia yangmingensis Yin et al. 2012 (fig. 236a–d), but can be distinguished by the anterior margin of epigynal plate without teeth in L. pengdangensis sp. nov. ( Fig. 177B ), whereas with teeth in L. yangmingensis ( Yin et al. 2012 , fig. 236C, D). Spiral folds with two and half turns in L. pengdangensis sp. nov. ( Fig. 177B, C ), whereas with one and half turns in L. yangmingensis ( Yin et al . 2012 , fig. 236d). Description. Female ( holotype , Fig. 177A ): Carapace 1.95 long, 1.33 wide, yellow; fovea, cervical, and radial grooves distinct. Clypeus 0.36 high. Sternum longer than wide, yellow, sparsely covered with microsetae. Labium wider than long. Maxillae long, distal end broad with scopulae. Chelicerae with five promarginal and four retromarginal teeth. AER recurved, PER straight, slightly wider. Eye sizes and interdistances: AME 0.09, ALE 0.12, PME 0.09, PLE 0.11, AME–AME 0.05, PME–PME 0.10, AME–ALE, 0.11, PME–PLE 0.13, AME–PME 0.14, ALE–ALE 0.60, PLE–PLE 0.64, ALE–PLE contiguous. Length of legs: I 13.36 (3.57, 4.02, 3.93, 1.84), II 11.1 (2.92, 3.87, 2.89, 1.42), III 6.01 (2.12, 1.78, 1.42, 0.69), IV 10.85 (2.89, 3.74, 3.11, 1.11). Leg formula I-II-IVIII. Tm I 0.73. Tibial spine formula: 2-2-2-2. Abdomen damaged. FIGURE 174. Distribution of Lepthyphantes species. FIGURE 175. Linyphia gaoshidongensis sp. nov. , female holotype. A, B Epigyne, ventral view C Vulva, dorsal view. FIGURE 176. Linyphia gaoshidongensis sp. nov. , female holotype. A Habitus, dorsal view B Habitus, ventral view. Epigyne ( Fig. 177B, C ): Scape protruding, robust; cavity with a triangular projection on each side; copulatory openings narrow, covered by the lateral walls. Vulva: spiral folds with two and half turns; spermathecae elliptical, extending towards anterior margin of epigynal plate. Male. Unknown. Distribution. Known only from the type locality ( Fig. 180 ).