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 galle Li sp. nov. Figures 7 , 8 , 52 Type material. Holotype : male (IZCAS), Rumassala Mountain ( 6°1.48'N , 80°14.55'E , elevation 51 m), Unawatuna Village, Galle District, Southern Province , Sri Lanka , 12-13 October 2014, S. Kosala leg. Paratype : 1 female (IZCAS), same data as holotype. Etymology. The specific name refers to the type locality; noun in apposition. Diagnosis. Males can be distinguished from congeners by the distinctly longer (longer than tegular) and bent embolus (Fig. 7B ); from M. ratnapura sp. nov. (Fig. 33B ), M. phuket sp. nov. (Fig. 27B ), and M. hponkanrazi sp. nov. (Fig. 9B ) by the absence of conductor (vs. presence of distinct conductor projected from the base of embolus). The females can be distinguished by a pair of horizontally twisted spermathecae (Fig. 8A ). Figure 7. Merizocera galle sp. nov., holotype male. A Bulb, dorsal view B bulb, dorsal view C palp, prolateral view D palp, retrolateral view. Abbreviations: CP = cymbial protrusion, EM = embolus. Description. Male (holotype). Total length 1.00; carapace 0.48 long, 0.42 wide; abdomen 0.51 long, 0.36 wide. Carapace circular, brownish, with dark brown marks laterally and brown median stripe on anterior half (Fig. 8C ). Fovea shallow. Thoracic region distinctly elevated medially. Clypeus brownish, with dark brown marks medially. Labium and sternum dark brown. Abdomen slightly elongated, dark grey, with dark marks posteriorly and ventrally. Legs brown; measurements: I 3.73 (1.00, 0.17, 1.13, 0.90, 0.53), II 2.98 (0.79, 0.16, 0.85, 0.72, 0.46), III 2.49 (0.70, 0.13, 0.67, 0.63, 0.36), IV 3.74 (0.98, 0.16, 1.13, 0.96, 0.51). Palp (Fig. 7A-D ): femur slender, thrice longer than patella; patella not swollen; tibia similar length as femur; cymbium with distal protrusion, half length of femur, length ratio of dorsal protrusion and cymbium 0.54; bulb pale yellow, pyriform with embolus arising distally, conductor absent; embolus distinctly elongated and bent, 1.5 times longer than the tegular. Figure 8. Merizocera galle sp. nov., holotype male and paratype female. A Endogyne, dorsal view B female epigastric area, ventral view C male habitus, dorsal view D female habitus, dorsal view E female habitus, ventral view. Abbreviation: SP = spermatheca. Female (paratype). General features and colouration similar to those of male (Fig. 8D, E ). Measurements: total length 1.24; carapace 0.53 long, 0.45 wide; abdomen 0.70 long, 0.48 wide. Leg measurements: I 3.62 (0.94, 0.17, 1.08, 0.89, 0.54), II 3.03 (0.78, 0.17, 0.87, 0.73, 0.48), III missing, IV 3.70 (0.95, 0.16, 1.13, 0.92, 0.54). Epigastric area (Fig. 8B ): brown, lanceolate patch. Endogyne (Fig. 8A ) with pair of horizontally twisted spermathecae, ratio of the width of twisted spermatheca and the interdistance of spermathecae 1:4. Distribution. Known only from the type locality (Sri Lanka; Fig. 52 ).