mahakamensis, Leiocassis Vaillant [L. L.] 1902:55, Figs. 4-5 [Notes from the Leyden Museum v. 24 (note 1); ref. 4490] Tepoe, Mahakam River, eastern Kalimantan, Borneo, Indonesia. Syntypes: RMNH 7838 (2). Type catalog: Ferraris 2007:104 [ref. 29155]. •Valid as Leiocassis mahakamensis Vaillant 1902 -- (Burgess 1989:70 [ref. 12860], Kottelat et al. 1993:64 [ref. 23448]). •Valid as Pseudomystus mahakamensis (Vaillant 1902) -- (Mo 1991:140 [ref. 19952], Ng & Rachmatika 1999:177 [ref. 23964], Ng & Siebert 2005:3 [ref. 28064], Ng & Lim 2005:16 [ref. 28081], Ferraris 2007:104 [ref. 29155], Kim & Ng 2008:45 [ref. 29456], Kottelat 2013:265 [ref. 32989], Ahmad et al. 2023:103 [ref. 41243] as cf. mahakamensis, Ng & Tan 2024:551 [ref. 41425]). Current status: Valid as Pseudomystus mahakamensis (Vaillant 1902). Bagridae. Distribution: Southeast Asia: eastern Borneo and (?) Sumatra (Indonesia). Habitat: freshwater.