Nais variabilis Piguet. Liang 1958; Chen 1959: 27; Wang 2002: 84; Cui 2008: 61. Nais communis Piguet.Chen, 1940: 33 –34.
Material. Yarlung Zangbu River: ST 2, 2 spms; ST 5, 7 spms; Niyang River: ST 29, 12 spms; ST 30, 4 spms; ST 32, 4 spms.
Remarks. Cosmopolitan. First record from Tibet.