eurycephalus, Gobius Kessler [K. F.] 1874:281 [91] [Trudy St.-Peterburgskogo Obscestva Estestvoispytatelej = Travaux de la Société des Naturalistes de St. Pétersbourg. v. 5; ref. 18397] Enikale near Kerch, Crimea, Ukraine. Lectotype: ZIN 2234. Paralectotypes: ZIN 2219 (1). On p. 91 of separate. Lectotype selected by Pinchuk 1977:588 [ref. 8999]. •Questionably a synonym of Neogobius cephalarges (Pallas 1814) -- (Berg 1949:1087 [ref. 20662], Miller 1973:502 [ref. 6888]). •Synonym of Neogobius platyrostris (Pallas 1814), but a valid subspecies -- (Pinchuk 1977:588 [ref. 8999], Reshetnikov et al. 1997:756 [ref. 24702]). •Valid as Neogobius eurycephalus (Kessler 1874) -- (Miller in Whitehead et al. 1986:1059 [ref. 13677], Kottelat 1997:178 [ref. 22952], Vasil'eva 1998:138 [ref. 23591], Bilecenoğlu et al. 2002:134 [ref. 26753], Pinchuk et al. 2003:212 [ref. 27348], Vasil'eva 2003:S49 [ref. 28444], Bogutskaya & Naseka 2004:229 [ref. 28183], Fricke et al. 2007:105 [ref. 29533], Kottelat & Freyhof 2007:578 [ref. 29996], Vasil'eva 2007:161 [ref. 30517], Kovačić & Patzner 2011:187 [ref. 31737]). •Valid as Ponticola eurycephalus (Kessler 1874) -- (Neilson & Stepien 2009:97 [ref. 30497], Medvedev et al. 2013:705 [ref. 35208], Stepien & Neilson 2013:2 [ref. 35325], Parin et al. 2014:497 [ref. 33547], Çiçek et al. 2015:152 [ref. 35151], Vasil'eva et al. 2016:9 [ref. 34347], Özuluğ & Saç 2019:28 [ref. 36599], Çiçek et al. 2020:256 [ref. 37644], Manilo 2020:70 [ref. 37795], Abliazov et al. 2021:11 [ref. 38576], Parenti 2021:74 [ref. 38603], Çiçek et al. 2023:432 [ref. 40625], Çiçek et al. 2024:310 [ref. 40789]). Current status: Valid as Ponticola eurycephalus (Kessler 1874). Gobiidae: Gobiinae. Distribution: Eurasia: Black Sea basin and Sea of Azov. Habitat: freshwater, brackish.