tenebricus, Leiocassis Ng [H. H.] & Lim [K. K. P.] 2006:169, Fig. 3 [Ichthyological Exploration of Freshwaters v. 17 (no. 2); ref. 28701] Sungai Nah, tributary to Kayan River, about 20 minutes upstream of confluence with Iwan River 1°57'43.2"N, 115°06'35.4"E, Kayan River drainage, Kalimantan Timur, Borneo, elevation 550 meters. Holotype: MZB 10718. Paratypes: ZRC 46155 (3). Type catalog: Ng & Kim 2008:32 [ref. 29920]. •Valid as Leiocassis tenebricus Ng & Lim 2006 -- (Ferraris 2007:443 [ref. 29155]). •Valid as Leiocassis tenebrica Ng & Lim 2006 -- (Kottelat 2013:261 [32989], Ng & Tan 2018:334 [ref. 36208], Ng & Hadiaty 2019:197 [ref. 36874]). Current status: Valid as Leiocassis tenebrica Ng & Lim 2006. Bagridae. Distribution: Kayan River basin, northeastern Borneo. Habitat: freshwater.