anfractus, Clarias Ng [H. H.] 1999:18, Figs. 1a, 2a, 3a, 4a [Raffles Bulletin of Zoology v. 47 (no. 1); ref. 23892] Danum valley, forest stream 600 meters into conservation area, tributary of Sungai Segama, Sabah, Borneo, eastern Malaysia. Holotype: ZRC 42598. Paratypes: FMNH 68095-96 (2, 1), ZRC 43392 (2). Type catalog: Ferraris 2007:139 [ref. 29155], Ng & Kim 2008:38 [ref. 29920]. •Valid as Clarias anfractus Ng 1999 -- (Ng 2001:159 [ref. 25460], Sudarto et al. 2003:153 [ref. 27238], Sudarto et al. 2004:8 [ref. 27680], Ferraris 2007:139 [ref. 29155], Ng & Hadiaty 2011:1582 [ref. 31220], Kottelat 2013:242 [ref. 32989], Wilkinson & Tan 2018:602 [ref. 36226]). Current status: Valid as Clarias anfractus Ng 1999. Clariidae. Distribution: Northern Borneo. Habitat: freshwater.