Twenty-eight new species of the spider genus Merizocera Fage, 1912 (Araneae, Psilodercidae) from South and Southeast Asia Author Chang, Wan-Jin Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China & Southeast Asia Biological Diversity Research Institute, Chinese Academy of Sciences, Yezin, Nay Pyi Taw 05282, Myanmar & University of Chinese Academy of Sciences, Beijing 100049, China Author Yao, Zhiyuan Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China https://orcid.org/0000-0002-1631-0949 Author Li, Shuqiang Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China & University of Chinese Academy of Sciences, Beijing 100049, China https://orcid.org/0000-0002-3290-5416 lisq@ioz.ac.cn text ZooKeys 2020 961 41 118 http://dx.doi.org/10.3897/zookeys.961.53058 journal article http://dx.doi.org/10.3897/zookeys.961.53058 1313-2970-961-41 B5627BFE56A242B3B3A596BAE07724F4 C1D92F70C65F53668E36B8CF62DB4D8A Merizocera tak Li sp. nov. Figures 37 , 54 Type material. Holotype : female (IZCAS), Mae Klong Noi Subdistrict ( 16°14.64'N , 98°59.91'E , elevation 1228 m), Umphang District, Tak , Thailand , 17 November 2016, P. Wongprom leg. Etymology. The specific name refers to the type locality; noun in apposition. Diagnosis. Females can be distinguished from all congeners by the presence of two pairs of globose spermathecae, the median pair resembling the figure '8' (Fig. 37A ). Description. Female (holotype). Total length 1.21; carapace 0.58 long, 0.49 wide; abdomen 0.61 long, 0.47 wide. Carapace circular, brown, with dark brown radiating marks (Fig. 37C ). Fovea shallow. Thoracic region distinctly elevated medially. Clypeus, labium, and sternum dark brown. Abdomen ovoid, dark brown (Fig. 37B ). Legs light brown; measurements: I 3.47 (0.84, 0.19, 1.03, 0.85, 0.56), II 2.93 (0.73, 0.18, 0.84, 0.68, 0.50), III 2.41 (0.59, 0.16, 0.65, 0.58, 0.43), IV 3.48 (0.85, 0.19, 1.00, 0.85, 0.59). Epigastric area (Fig. 37B ): dark brown semi-circular patch, medially with a slit. Endogyne (Fig. 37A ) with two pairs of globose spermathecae, median pair made up of two overlying globose spermathecae resembling the figure '8' , lateral pairs 1/4 size of median pair. Figure 37. Merizocera tak sp. nov., holotype female. A Endogyne, dorsal view B female epigastric area, ventral view C female habitus, dorsal view D female habitus, ventral view E female habitus, lateral view. Abbreviation: SP = spermatheca. Male. Unknown. Distribution. Known only from the type locality (Thailand; Fig. 54 ).