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 wenshan Li sp. nov. Figures 45 , 46 , 53 Type material. Holotype : male (IZCAS), near Daweishan National Nature Reserve ( 22°54.65'N , 103°41.78'E , elevation 2070 m), Pingbian County, Wenshan, Yunnan , China , 21 May 2015, Z. Chen and Y. Li leg. Paratypes : 3 females (IZCAS), same data as holotype. Etymology. The specific name refers to the type locality; noun in apposition. Diagnosis. Males resemble M. wui sp. nov. but can be distinguished by a broad embolus (Fig. 45B ) (vs. narrow and thin embolus (Fig. 47B )), absence of a conductor (vs. presence of a short conductor (Fig. 47B )), a short and wide cymbium protrusion (Fig. 45D ) (vs. long and thin cymbium protrusion (Fig. 47D )), and a pyriform bulb (Fig. 45B ) (vs. spherical bulb (Fig. 47B )). Females can be distinguished by a pair of upright tubular spermathecae (Fig. 46A ) (vs. a pair of angled clavate spermathecae (Fig. 48A )). Figure 45. Merizocera wenshan 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 1.28; carapace 0.62 long, 0.51 wide; abdomen 0.67 long, 0.58 wide. Carapace circular, brown, with dark brown radiating marks (Fig. 46C ). Fovea shallow. Thoracic region distinctly elevated medially. Clypeus and labium dark brown. Sternum brown but dark brown laterally. Abdomen ovoid, dark brown. Legs light brown; measurements: I 3.45 (0.91, 0.22, 1.01, 0.80, 0.51), II missing, III 2.52 (0.67, 0.19, 0.65, 0.58, 0.43), IV 3.62 (0.94, 0.20, 1.05, 0.84, 0.59). Palp (Fig. 45A-D ): femur slender, four times longer than patella; patella not swollen; tibia not swollen; cymbium with distal protrusion, half as long as femur; bulb pale yellow, pyriform with embolus merging distally; embolus clavate with blunt tip, similar in length to and approx. thrice narrower than tegular; conductor absent. Figure 46. Merizocera wenshan 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). Similar to male in colouration and general features but slightly larger (Fig. 46D, E ). Measurements: total length 1.34; carapace 0.63 long, 0.55 wide; abdomen 0.71 long, 0.57 wide. Leg measurements: I 3.20 (0.81, 0.20, 0.95, 0.71, 0.53), II 2.78 (0.71, 0.22, 0.77, 0.60, 0.48), III 2.42 (0.63, 0.18, 0.63, 0.57, 0.41), IV 3.45 (0.87, 0.20, 1.04, 0.78, 0.56). Epigastric area (Fig. 46B ): dark brown semi-circular patch. Endogyne (Fig. 46A ) with a pair of anteriorly directed tubular spermathecae, ratio of the width of a spermatheca to the interdistance of spermathecae 1:5. Distribution. Known only from the type locality (China; Fig. 53 ).