Abstract
BACKGROUND: The wall crab spider genus Siamspinops Dankittipakul & Corronca, 2009 contains eight species restricted to South and Southeast Asia, of which two are recorded from China. NEW INFORMATION: A new species, Siamspinopsyejiei sp. n., is diagnosed and described based on both sexes from Foding Mountain National Nature Reserve, Guizhou, China. Diagnostic photos of the habitus and copulatory organs and a distributional map are provided.