batrachocephalus, Gobius Pallas [P. S.] 1814:149 [Zoographia Rosso-Asiatica v. 3; ref. 3351] Black Sea near Chersonesus [Kherson] and Balaklava, Crimea, Ukraine. Syntypes: whereabouts unknown. See Coad 1995:30 [ref. 23608]. •Valid as Mesogobius batrachocephalus (Pallas 1814) -- (Berg 1949:1096 [ref. 20662], Miller 1973:501 [ref. 6888], Pinchuk 1977:595 [ref. 8999], Miller in Whitehead et al. 1986:1055 [ref. 13677], Kottelat 1997:178 [ref. 22952], Reshetnikov et al. 1997:755 [ref. 24702], Vasil'eva 1998:136 [ref. 23591] with question in genus, Bilecenoğlu et al. 2002:133 [ref. 26753], Vasil'eva 2003:S48 [ref. 28444], Pinchuk et al. in Miller 2004:109 [ref. 27853], Bogutskaya & Naseka 2004:226 [ref. 28183], Vassilev & Pehlivanov 2005:182 [ref. 28369], Fricke et al. 2007:105 [ref. 29533], Kottelat & Freyhof 2007:575 [ref. 29996], Vasil'eva 2007:160 [ref. 30517], Ninua & Japoshvili 2008:172 [ref. 31251], Neilson & Stepien 2009:97 [ref. 30487], Kovačić & Patzner 2011:187 [ref. 31737], Freyhof 2011:284 [ref. 31742], Psomadakis et al. 2012:17 [ref. 33457], Parin et al. 2014:491 [ref. 33547], Çiçek et al. 2015:152 [ref. 35151], Artüz & Fricke 2019:559 [ref. 36612], Çiçek et al. 2020:256 [ref. 37644], Kuljanishvili et al. 2020:[5] [ref. 37535], Manilo 2020:69 [ref. 37795], Abliazov et al. 2021:11 [ref. 38576], Parenti 2021:72 [ref. 38603], Niță et al. 2022:77 [ref. 40471], Çiçek et al. 2023:431 [ref. 40625], Çiçek et al. 2024:306 [ref. 40789]). Current status: Valid as Mesogobius batrachocephalus (Pallas 1814). Gobiidae: Gobiinae. Distribution: Eurasia: Black Sea and Sea of Azov basins. Habitat: freshwater, brackish.