Survey of Linyphiidae (Arachnida: Araneae) spiders from Yunnan, China Author Irfan, Muhammad 0000-0003-0445-9612 College of Life Sciences, Hunan Normal University, Changsha, 410081, China Author Zhang, Zhi-Sheng 0000-0002-9304-1789 Key Laboratory of Eco-environments in Three Gorges Reservoir Region (Ministry of Education), School of Life Sciences, Southwest University, Chongqing 400715, China. Author Peng, Xian-Jin 0000-0002-2614-3910 College of Life Sciences, Hunan Normal University, Changsha, 410081, China text Megataxa 2022 2022-12-27 8 1 1 292 http://dx.doi.org/10.1094/PDIS-04-22-0755-PDN journal article 10.11646/megataxa.8.1.1 2703-3090 7526571 Sinisterigone gen. nov. (ǺẮƦø) Type species: Sinisterigone circularis sp. nov. ( AE ḆǺẮƦ) Etymology. The genus name comes from the Latin adjective “ Sinister ”, meaning “the left”, referring to embolus curved in clock wise direction in left male palp. Gender is masculine. Diagnosis. Sinisterigone gen. nov. can be distinguished from any other Erigoninae genus by the embolic division with long, curved anterior radical process and the filiform embolus. Copulatory ducts with long coiled spirals extending anteriorly before joining to the spermathecae ( Figs 291A–D , 292A, B , 293A–C ).