Ten new species of the spider genus Sinoderces Li & Li, 2017 from China, Laos and Thailand (Araneae, Psilodercidae) Author Bai, Zilong Author Li, Fengyuan Author Li, Shuqiang text ZooKeys 2019 886 79 111 http://dx.doi.org/10.3897/zookeys.886.39212 journal article http://dx.doi.org/10.3897/zookeys.886.39212 1313-2970-886-79 FF4F3062D2834B5D80C3AEFC6361CE39 FE26EDCBAAAE55D9AF310A7BFBD1FD85 Sinoderces kieoensis Li & Li sp. nov. Figs 19 , 20 , 21 , 22 Types. Holotype : ♂, Kieo Cave, Vang Vieng District, 10.37 km north of Viengkieo Village, Vientiane Province, Laos, 19°00.880'N , 102°25.902'E , 286 m, 2.XII.2012, Yao Z. leg. Etymology. The specific name refers to the name of the cave at the type locality; adjective. Diagnosis. Sinoderces kieoensis sp. nov. resembles S. phathaoensis sp. nov. in having a similar shaped bulb in males. Males can be distinguished from by the straight embolus, with less than half the bulb length in S. kieoensis sp. nov. ( Fig. 18 B-D ), in contrast with to the curved, embolus almost half as long as the bulb ( Fig. 5 B, C ). The bulb of S. kieoensis sp. nov. ( Fig. 18 ) is thicker and more blunt than that of S. pathaoensis sp. nov. ( Fig. 5 ). Figure 19. Sinoderces kieoensis Li & Li, sp. nov., male holotype A palp, ventral view B palp, prolateral view C palp, retrolateral view D palpal bulb, ventral view Abbreviation: EM embolus. Description. Male (holotype). Total length 2.28; carapace 0.72 long, 0.78 wide; abdomen 1.56 long, 0.63 wide. Carapace round, yellow, with brown lateral margins. The brown line is close to the center with a circular brown spot. Clypeus brown, medially with one pair of bifurcate apophyses. Chelicerae dark yellow. Cheliceral promargin with one tooth, connected to a lamina, retromargin with one small tooth ( Fig. 21J ). Endites brown. Labium brown. Sternum dark yellow. Leg measurements: I missing, II missing, III missing, IV missing. Abdomen elongated; dorsum dark brown, with yellow stripe; ventrum dark yellow; the color of the abdomen gradually darkens from anterior to posterior. Male palp ( Fig. 18 ): Bulb yellow, conical. The center of the bulb with slight constriction. Embolus arising distally from bulb, straight. No conductor. Tibia dark yellow. Femur and trochanter light yellow. Distribution. Known only from the type locality ( Fig. 22 ). Natural history. Collected in a cave at an elevation of 286 m. Figure 20. Sinoderces kieoensis Li & Li, sp. nov., male holotype A male habitus, ventral view B male habitus, dorsal view (Arrow: apophysis). Figure 21. Cheliceral retromargin A Sinoderces khanensis sp. nov. B S. luohanensis sp. nov. C S. phathaoensis sp. nov. D S. dewaroopensis sp. nov. E S. xueae sp. nov. F S. taichi sp. nov. G S. wenshanensis sp. nov. H S. aiensis sp. nov. I S. saraburiensis sp. nov. J S. kieoensis sp. nov. Abbreviations: RT retromargin teeth, PT promarginal teeth, CL cheliceral laminal. Figure 22. Distribution of ten new Sinoderces in China, Laos and Thailand 1 Sinoderces khanensis sp. nov. 2 S. luohanensis sp. nov. 3 S. phathaoensis sp. nov. 4 S. dewaroopensis sp. nov. 5 S. xueae sp. nov. 6 S. taichi sp. nov. 7 S. wenshanensis sp. nov. 8 S. aiensis sp. nov. 9 S. saraburiensis sp. nov. 10 S. kieoensis sp. nov.