Three new species of the genus Trilacuna Tong & Li, 2007 (Araneae, Oonopidae) from Yunnan Province, China.

Three new species of the genus Trilacuna Tong & Li, 2007, T.cangshan Tong, Yang & Zhang, sp. nov. (♂), T.wumanshan Tong, Yang & Zhang, sp. nov. (♂), and T.xiaoheishan Tong, Yang & Zhang, sp. nov. (♂♀) are described from Yunnan, China. Descriptions, diagnoses, and photographs are provided.