The genus Jacaena Thorell, 1897 from southern China (Araneae: Liocranidae) Author Mu, Yannan 0000-0002-2504-673X The Key Laboratory of Invertebrate Systematics and Application, Institute of Life Science and Green Development, Hebei University, Baoding, Hebei 071002, P. R. China & 15188605531 @ 163. com; https: // orcid. org / 0000 - 0002 - 2504 - 673 X Author Zhang, Feng 0000-0002-3347-1031 The Key Laboratory of Invertebrate Systematics and Application, Institute of Life Science and Green Development, Hebei University, Baoding, Hebei 071002, P. R. China text Zootaxa 2020 2020-07-23 4819 2 335 348 journal article 8961 10.11646/zootaxa.4819.2.6 2315fd5b-b9f0-4c78-956c-8c9ee7a8d35b 1175-5326 4440608 41C762ED-B83A-41A2-B769-22CF58B38977 Jacaena luteolus sp. n. (黄.×ƚ,) Figs 1G , 2B , 5 A–C Type material. Holotype ♂ , CHINA , Guangdong Province , Chaozhou City , Chao’an County , Jiaoshuikeng Vil-lage, 8 Aug 2011 , leg. Shuwen Xing. Etymology. The specific name is a Latin adjective meaning “tawny”, referring to the color of the palp. Diagnosis. This new species is similar to J. jinxini , but can be distinguished by: 1) the short embolus ( vs longer embolus); 2) the expanded and thumb-shaped pRTA ( vs truncated); 3) the different color of whole palp fulvous. Description. Male ( Holotype ). Total body length 5.89: carapace 2.97 long, 2.32 wide; abdomen 2.92 long, 1.72 wide. Carapace nearly circular, deep red-brown, with radial granulated integument; eye area relatively wide; fovea deep and round. Eye sizes and interdistances: AME 0.15, ALE 0.15, PME 0.10, PLE 0.14; AME–AME 0.10, AME–ALE 0.06, PME–PME 0.14, PME–PLE 0.15, ALE–PLE 0.10; MOA 0.36 long, anterior width equal to poste-rior width (0.36). Clypeal height 0.23. Leg spination: femur I with 2 strong pl spines, other femora spineless; femur I with 2 strong pl spines, other femora spineless; tibia I with 8 pv and 7 rv spines, tibia II with 6 pv and 8 rv spines, tibia III with 2 pl and 1 rv spines, tibia IV absent; metatarsus I with 5 pl and 4 rl spines, metatarsus II with 3 pl and 4 rl spines, metatarsus III with 1 pl spines, metatarsus IV absent. Leg I 7.85 (2.16+0.90+2.13+1.81+0.85), Leg II 7.07 (1.98+0.87+1.76+1.50+0.96), Leg III 6.20 (1.73+0.81+1.29+1.42+0.95), Leg IV absent. Leg formula: 4123. Other characters as for J. aspera sp. n. , except for coloration. Abdomen oval and gray, with small distinct dorsal scutum (occupying less than half the length of the abdomen), two pairs of muscular impressions centrally. Palp as illustrated ( Fig. 5 A–C). Tibia short, yellowish-brown, RTA with two processes, dRTA rounded distally and strongly sclerotized, pRTA expanded and sclerotized. Tegulum same color as tibia, reniform, with distinct sperm duct and short thin tegular apophysis. Embolus short (not exceeding tip of TA), strongly coiled, tip alongside tegular apophysis. Conductor membranous, behind embolus. Female: unknown. Distribution. China ( Fig. 9 , Guangdong Province ).