sordidus, Gobius Bennett [E. T.] 1835:91 [Proceedings of the Zoological Society of London 1835 (pt 3); ref. 16793] Near Trabzon [Trebizond], Turkey, Black Sea. No types known. •Questionably a synonym of Gobius paganellus Linnaeus 1758 -- (Miller 1973:487 [ref. 6888], Miller 1990:937 [ref. 19376]). •Questionably a synonym of Neogobius fluviatilis (Pallas 1814) -- (Miller 1973:502 [ref. 6888], Kottelat 1997:178 [ref. 22952]). •Synonym of Neogobius fluviatilis (Pallas 1814) -- (Vasil'eva 1998:139 [ref. 23591], Pinchuk et al. 2003:222 [ref. 27349], Neilson & Stepien 2009:96 [ref. 30497], Parenti 2021:73 [ref. 38603], Çiçek et al. 2024:308 [ref. 40789]). Current status: Synonym of Neogobius fluviatilis (Pallas 1814). Gobiidae: Gobiinae. Habitat: freshwater, brackish, marine.