Nine new species of the spider family Araneidae (Arachnida, Araneae) from Xishuangbanna, Yunnan, China Xiaoqi Mi 1 , Shuqiang Li 2 1 College of Agriculture and Forestry Engineering and Planning, Guizhou Provincial Key Laboratory of Biodi- versity Conservation and Utilization in the Fanjing Mountain Region, Tongren University, Tongren 554300, Guizhou, China 2Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China Corresponding author: Shuqiang Li (lisq@ioz.ac.cn) Academic editor: Zhiyuan Yao | Received 22 August 2021 | Accepted 25 October 2021 | Published 19 November 2021 http://zoobank.org/DE29D6A5-E9BA-4FB4-92C2-6985AE680753 Citation: Mi X, Li S (2021) Nine new species of the spider family Araneidae (Arachnida, Araneae) from Xishuangbanna, Yunnan, China. ZooKeys 1072: 49–81. https://doi.org/10.3897/zookeys.1072.73345 Abstract Nine new species of the orb-weaver spider family Araneidae Clerck, 1757 from Menglun Town, Xishuang- banna, Yunnan, China are described: Acusilas tongi sp. nov. (♂♀), Chorizopes yui sp. nov. (♂♀), Chorizopesoides guoi sp. nov. (♂♀), Deione cheni sp. nov. (♀), D. yangi sp. nov. (♂♀), Hypsosinga pulla sp. nov. (♂♀), Mangora baii sp. nov. (♂♀), M. cephala sp. nov. (♂♀) and Milonia gemella sp. nov. (♂♀). Te genus Milonia Torell, 1890 is recorded from China for the frst time. Te previous description of Chorizopesoides wulingensis (Yin, Wang & Xie, 1994) from Libo County, Guizhou by Mi and Wang (2018) refers to Chorizopesoides annasesta- kovae sp. nov. (♂♀). Diagnostic photos of the habitus and copulatory organs of the new species are provided. Keywords Morphology, new record, orb-weaver spider, taxonomy Introduction Te spider family Araneidae Clerck, 1757 is the third largest family in Araneae, with a total of 3067 species in 177 genera worldwide (WSC 2021). In China, 402 species in 50 genera have been recorded (Li 2020, Yao and Li 2021, Li et al. 2021). Xishuangbanna Tropical Botanical Garden (XTBG) in Menglun Town lies in Mengla County, Yunnan Province, southwest China. A total of 782 spider species have ZooKeys 1072: 49–81 (2021) doi: 10.3897/zookeys.1072.73345 https://zookeys.pensoft.net Copyright Xiaoqi Mi, Shuqiang Li This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. RESEARCH ARTICLE Launched to accelerate biodiversity research A peer-reviewed open-access journal