Nais bretscheri Michaelsen. Liang 1962: 17 –18, 1964: 644; Wang 2002: 85; Cui 2008: 61; [non] Chen 1940: 35–36.
Material. Yarlung Zangbu River: ST 5, 5 spms. Lhasa River: ST 8, 4 spms; ST 9, 2 spms; ST 10, 11 spms; ST 11, 3 spms. Niyang River: ST 31, 1 spm; ST 32, 3 spms; Lake Yamzhao Yumco: ST 53, 14 spms. Remarks. Cosmopolitan. First record from Tibet.