nigrescens, Callichrous Day [F.] 1870:616 [Proceedings of the Zoological Society of London 1869 (pt 3) (art. 3) (for 9 Dec. 1869); ref. 14093] Branches of Irrawaddy River; Pegu, and Sittoung rivers, Myanmar. Syntypes: (many) AMS B.7636 (1), ZSI A.500 (2, lost). Type catalog: Whitehead & Talwar 1976:157 [ref. 23762], Ferraris et al. 2000:300 [ref. 25110], Ferraris 2007:374 [ref. 29155]. Reasons for loss of ZSI type specimens during WWII see Chopra 1947:349-350 [ref. 33077]. •Species inquirenda in Ompok -- (Ferraris 2007:374 [ref. 29155]). •Synonym of Ompok pabo (Hamilton 1822) -- (Menon 1999:219 [ref. 24904], Jayaram 2006:110 [ref. 28762], Kottalot 2013:236 [ref. 32989]). Current status: Synonym of Ompok pabo (Hamilton 1822). Siluridae. Habitat: freshwater.