nigrescens, Labeo Day [F.] 1870:371 [3] [Proceedings of the Zoological Society of London 1870 (pt 2) (art. 3) (for 26 May 1870); ref. 17369] Mangalore, India. Syntypes and/or Day specimens: AMS B.7703 (1, syntype), NMW 53554-55 (1, 1), RMNH 2538 (1), ZMB 11031 (1), ZSI 1125 (1). Type catalog: Whitehead & Talwar 1976:156 [ref. 23762], Ferraris et al. 2000:300 [ref. 25110]. On p. 3 of separate. •Synonym of Labeo calbasu (Hamilton 1822) -- (Menon 1999:130 [ref. 24904]). •Valid as Labeo nigrescens Day 1870 -- (Talwar & Jhingran 1991:215 [ref. 20764], Jayaram & Dhas 2000:72 [ref. 25342], Plamoottil & Zupančič 2017:305 [ref. 35479], Sudasinghe et al. 2018:229 [ref. 36164]). Current status: Valid as Labeo nigrescens Day 1870. Cyprinidae: Labeoninae. Distribution: Karnataka, India. Habitat: freshwater, brackish.