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 Ketambea falcata sp. nov. (ỆǞÁƦ) Figures 161 , 164 Types: Holotype ♀ , CHINA , Yunnan , Gongshan County , Qiqi Dongshaofang , 27.69521°N , 98.48514°E , alt. 3208m , 29 September 2007 , Xian-jin Peng leg. (20070929). Etymology: This epithet derives from the Latin adjective “ falcatus ”, meaning “curved”, referring to the curved spermathecae in the epigyne. Diagnosis: This new species resembles K. nigripectoris ( Oi, 1960 ) in: aperture oval, septum relatively wide, dividing aperture into two parts, but can be distinguished by: the spiral ducts with one loop in K. falcata sp. nov. ( Fig. 161C ), whereas with two loops in K. nigripectoris (Zhou, Irfan & Peng, 2018, fig. 3A–D). Description. Female ( holotype , Fig. 161A ). Total length 2.17. Carapace 1.06 long, 0.90 wide, yellow; cervical and radial grooves distinct. Clypeus 0.19 high. Sternum longer than wide, with sparse hairs. Labium yellow, wider than long. Maxillae long, distal end broad with scopulae and spine-like hairs. Chelicerae yellow, with three promarginal and three retromarginal teeth, stridulatory striae present. AER recurved, PER straight and slightly wider. Eye sizes and interdistances: AME 0.06, ALE 0.07, PME 0.06, PLE 0.08, AME–AME 0.04, PME–PME 0.06, AME–ALE, 0.06, PME–PLE 0.08, AME–PME 0.08, ALE–ALE 0.39, PLE–PLE 0.41, ALE– PLE contiguous. Length of legs: I 4.26 (1.16, 1.39, 1.02, 0.69), II 3.72 (1.04, 1.15, 0.89, 0.64), III 2.58 (0.77, 0.77, 0.62, 0.42), IV 3.37 (1.02, 1.02, 0.82. 0.51), legs long, slender and yellow. Leg formula: I-II-IV-III. Tm I 0.36. Tibial spine formula: 2-2-2-2. Abdomen; 1.46 long, 1.08 wide, oval, dark brown; ventral side light brown. Epigyne ( Fig. 161B, C ): Aperture oval, septum relatively wide, dividing aperture into two parts. The entrance groove opening blocked with copulatory plug (seems distal suprategular apophysis of male palp broken into both openings in this female). Vulva: spiral ducts very thick, each with one loop; spermathecae slightly curved, pointing away from each other. Male. Unknown. Distribution. Known only from the type locality ( Fig. 164 ).