A species of the genus Cyclocosmia Ausserer, 1871 collected from Guizhou Province, China is diagnosed and described as new to science: Cyclocosmia liui Xu, Xu & Li, sp. n. (♀). New records of Cyclocosmia latusicosta Zhu, Zhang & Zhang, 2006 (♀) from China (Yunnan Province) and Vietnam (Vinh Phuc Province, Ninh Binh Province), and Cyclocosmia ricketti (Pocock, 1901) collected from Jiangxi Province, China are also reported in this study.
Keywords: China; Cyclocosmia; Vietnam; taxonomy; trapdoor spider.