ratan, Gobius Nordmann [A. von] 1840:416, Pl. 11 (fig. 2) [Voyage dans la Russie méridionale et la Crimée; ref. 3209] Odessa, Ukraine. Syntypes: MNHN A-1125 (2), ZMB 2098 (1?). Type catalog: Bauchot et al. 1991:39 [ref. 19958]. Gobius rotan is a misspelling. •Valid as Neogobius ratan (Nordmann 1840) -- (Berg 1949:1086 [ref. 20662], Miller 1973:504 [ref. 6888], Miller in Whitehead et al. 1986:1064 [ref. 13677], Coad 1995:31 [ref. 23608], Reshetnikov et al. 1997:756 [ref. 24702], Vasil'eva 1998:142 [ref. 23591], Coad 1998:103 [ref. 23869], Bilecenoğlu et al. 2002:134 [ref. 26753], Pinchuk et al. 2003:357 [ref. 27348], Vasil'eva 2003:S51 [ref. 28444], Bogutskaya & Naseka 2004:231 [ref. 28183], Fricke et al. 2007:106 [ref. 29533], Vasil'eva 2007:167 [ref. 30517], Ninua & Japoshvili 2008:172 [ref. 31251], Kovačić & Patzner 2011:187 [ref. 31737], Artüz & Fricke 2019:559 [ref. 36612], Abliazov et al. 2021:11 [ref. 38576]). •Valid as Ponticola ratan (Nordmann 1840) -- (Neilson & Stepien 2009:97 [ref. 30487], Freyhof 2011:286 [ref. 31742], Stepien & Neilson 2013:2 [ref. 35325], Parin et al. 2014:501 [ref. 33547], Çiçek et al. 2015:152 [ref. 35151], Vasil'eva et al. 2016:9 [ref. 34347], Kaya et al. 2020:328 [ref. 37582], Khutornoy & Kvach 2019:919 [ref. 37129], Çiçek et al. 2020:256 [ref. 37644], Jouladeh-Roudbar et al. 2020:244 [ref. 37983], Manilo 2020:70 [ref. 37795], Parenti 2021:75 [ref. 38603], Çiçek et al. 2023:433 [ref. 40625], Çiçek et al. 2024:313 [ref. 40789]). Current status: Valid as Ponticola ratan (Nordmann 1840). Gobiidae: Gobiinae. Distribution: Eurasia: Black Sea, Sea of Azov, and Caspian Sea watersheds. Habitat: freshwater, brackish.