Sisorid catfishes of the genus Pseudecheneis Blyth, 1860 , are diagnosed by a thoracic adhesive apparatus consisting of a series of transverse ridges (laminae) separated by grooves (sulcae) (de Pinna, 1996; Roberts, 1998), and are found in the upper reaches of rivers throughout the Subhimalayan and Indochinese region. Recent studies (Ng & Edds, 2005; Ng, 2006a; Ng, 2006b) recognize eleven valid species of Pseudecheneis : P. sulcata (M'Clelland, 1842) ; P. paviei Vaillant, 1904 ; P. tchangi (Hora, 1937) ; P. immaculata Chu, 1982 ; P. sulcatoides Zhou & Chu, 1992 ; P. sympelvica Roberts, 1998 ; P. crassicauda Ng & Edds, 2005 ; P. serracula Ng & Edds, 2005 ; P. eddsi Ng, 2006 ; P. stenura Ng, 2006 ; and P. suppaetula Ng, 2006 .
