nigrescens, Bungia Keyserling [E. von] 1861:19 [22], Pl. 8 [Zeitschrift für die Gesammten Naturwissenschaften v. 17 (no. 1); ref. 2601] Harirud River at Herat, Afghanistan. No types saved. On p. 22 of separate. •Synonym of Gobio gobio (Linnaeus 1758) -- (Coad 1981:10 [ref. 22348], Kottelat 1997:60 [ref. 22952] with question, Bănărescu et al. 1999:81 [ref. 24850] with question). •Valid as Gobio nigrescens (Keyserling 1861) -- (Mousavi-Sabet et al. 2016:73 [ref. 34453], Esmaeili et al. 2017:49 [ref. 35254], Esmaeili et al. 2018:29 [ref. 36089], Coad 2019:3 [ref. 36775], Jouladeh-Roudbar et al. 2020:104 [ref. 37983], Sheraliev et al. 2020:[2] 236 [ref. 37518], Çiçek et al. 2023:33 [ref. 40326], Çiçek et al. 2024:192 [ref. 40789]). Current status: Valid as Gobio nigrescens (Keyserling 1861). Gobionidae. Distribution: Middle East and North Asia: Hari River basin (Afghanistan, Iran and Turkmenistan) and Amu Darya River basin (Uzbekistan). Habitat: freshwater.