Taxonomic revision of Telemidae (Arachnida, Araneae) from East and Southeast Asia Author Zhao, Huifeng Hebei Key Laboratory of Animal Diversity, College of Life Science, Langfang Normal University, Langfang 065000, China & College of Life Sciences, Capital Normal University, Beijing 100048, China Author Li, Shuqiang Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China https://orcid.org/0000-0002-3290-5416 lisq@ioz.ac.cn Author Zhang, Aibing College of Life Sciences, Capital Normal University, Beijing 100048, China zhangab2008@mail.cnu.edu.cn text ZooKeys 2020 933 15 93 http://dx.doi.org/10.3897/zookeys.933.38653 journal article http://dx.doi.org/10.3897/zookeys.933.38653 1313-2970-933-15 AE87B5CF9728466BAB056BFFFED802D4 C7F79558BB375F3482BCEABFB2F5F177 Mekonglema walayaku Zhao & Li sp. nov. Figures 16 , 17 , 33 Type material. Holotype: ♂ (IZCAS), China, Yunnan Province, Nujiang Lisu Autonomous Prefecture, Lushui County, Daxingdi Township, Walayaku Cave. 26.1215N , 98.8581E , elevation ca. 895 m, 24.VI.2016, Y. Li and J. Liu leg. Paratypes: 2♂ and 4♀ (IZCAS), same data as holotype. Etymology. The species name refers to the type locality; noun in apposition. Diagnosis. This species resembles M. kaorao sp. nov. but can be distinguished by the following characters: the bulb is ellipsoidal (Fig. 16C, D ) (vs. nearly globular), the tip of the embolus is well sclerotized (arrow on Fig. 16B ) (vs. unsclerotized); the neck of the receptacle is ca. three times thinner (vs. 1.50 times thinner) than the distal part of the receptacle (Fig. 17A ). Figure 16. Mekonglema walayaku sp. nov., male holotype A Habitus, dorsal view B embolus, apical view C palp, prolateral view D palp, retrolateral view. Scale bars: 0.2 mm ( A ), 0.05 mm ( B ), 0.1 mm ( C, D ). Description. Male (holotype). Total length 1.06. Carapace 0.49 long, 0.43 wide. Abdomen 0.56 long, 0.55 wide. Carapace light brown (Fig. 16A ). Eyes vestigial (Fig. 16A ). Chelicerae, legs, labium, and endites light yellow. Sternum bright brown with sparse setae. Leg measurements: I 3.65 (1.03, 0.18, 1.13, 0.78, 0.53); II 3.20 (0.96, 0.17, 0.95, 0.65, 0.47); III 2.26 (0.67, 0.16, 0.61, 0.44, 0.38); IV 2.86 (0.85, 0.16, 0.83, 0.59, 0.43). Abdomen dark blue (Fig. 16A ). Palp: Tibia 1.88 times longer than patella, cymbium 1.34 times longer than tibia, cymbial apophysis length as wide as cymbial base (Fig. 16C ); bulb ellipsoidal as in Fig. 16C, D ; embolus 5/7 as long as cymbium, directed dorsally (Fig. 16C, D ). Female. Total length 1.15. Carapace 0.50 long, 0.47 wide. Abdomen 0.63 long, 0.58 wide. Coloration as in male (Fig. 17B, C ). Leg measurements: I 3.36 (0.97, 0.19, 1.03, 0.69, 0.48); II 3.00 (0.89, 0.19, 0.88, 0.59, 0.45); III 2.15 (0.65, 0.17, 0.59, 0.40, 0.34); IV 2.80 (0.85, 0.18, 0.79, 0.56, 0.42). Abdomen blue. Receptacle membranous, neck much longer than tip, and tip three times wider than neck (Fig. 17A ). Distribution. China (Yunnan, Nujiang, site 4 in Fig. 33 ), known only from the type locality. Figure 17. Mekonglema walayaku sp. nov., female paratype A Endogyne, lateral view B habitus, dorsal view C habitus, ventral view. Scale bars: 0.05 mm ( A ), 0.2 mm ( B, C ).