microstomus, Clarias Ng [H. H.] 2001:158, Fig. 1 [Zoological Studies v. 40 (no. 2); ref. 25460] Kayan River drainage, Ladang near Sungai Pingai, 2°00'09.6"N, 115°09'13.8"E, Kalimantan Timur, Borneo, Indonesia. Holotype: MZB 9336. Paratypes: RMNH 7540-41 (2, 4); ZRC 45776 (8). Type catalog: Ferraris 2007:146 [ref. 29155], Ng & Kim 2008:41 [ref. 29920]. •Valid as Clarias microstomus Ng 2001 -- (Sudarto et al. 2003:154 [ref. 27238], Sudarto et al. 2004:9 [ref. 27680], Ng 2004:294 [ref. 27992], Ferraris 2007:146 [ref. 29155], Ng & Hadiaty 2011:1584 [ref. 31220], Kottelat 2013:244 [ref. 32989]). Current status: Valid as Clarias microstomus Ng 2001. Clariidae. Distribution: Mahakam and Kayan River basins, Borneo, Indonesia. Habitat: freshwater.