kessleri, Gobius Günther [A.] 1861:553 [Catalogue of the fishes in the British Museum v. 3; ref. 1964] Dniester River, Ukraine. Lectotype: ZIN 2107. Paralectotypes and/or Kessler material: NMW 29446, 3067 (1), 30552-53 (2); ZIN 2107a (1, lost), 2109 (1). Replacement name for Gobius platycephalus Kessler 1857, preoccupied twice in same family. Lectotype selected by Pinchuk 1977:590 [ref. 8999]. •Valid as Muellerigobius kessleri (Günther 1861) -- (Mihalcescu & Nalbant 2000:181 [ref. 26618]). •Valid as Neogobius kessleri (Günther 1861) -- (Berg 1949:1090 [ref. 20662], Miller 1973:503 [ref. 6888], Pinchuk 1977:590 [ref. 8999], Miller in Whitehead et al. 1986:1062 [ref. 13677], Coad 1995:31 [ref. 23608], Kottelat 1997:178 [ref. 22952], Reshetnikov et al. 1997:755 [ref. 24702], Ahnelt et al. 1998:666 [ref. 23709], Ahnelt & Duchkowitsch 2001:217 [ref. 25591], Ahnelt & Duchkowitsch 2002:[2] 914 [ref. 27148], Vasil'eva 2003:S50 [ref. 28444], Vasil'eva & Vasil'ev 2003:280 [ref. 27347], Vassilev & Pehlivanov 2005:183 [ref. 28369], Fricke et al. 2007:106 [ref. 29533], Kovačić & Engín 2008:74 [ref. 29624], Kottelat & Freyhof 2007:581 [ref. 29996], Vasil'eva 2007:165 [ref. 30517], Kovačić & Patzner 2011:187 [ref. 31737]). •Valid as Ponticola kessleri (Günther 1861) -- (Neilson & Stepien 2009:97 [ref. 30487], Medvedev et al. 2013:705 [ref. 35208], Stepien & Neilson 2013:2 [ref. 35325], Parin et al. 2014:499 [ref. 33547], Vasil'eva et al. 2016:9 [ref. 34347], Artüz & Fricke 2019:559 [ref. 36612], Ćaleta et al. 2019:183 [ref. 37026], Manilo 2020:70 [ref. 37795], Tutman et al. 2020:8 [ref. 38008], Kvach et al. 2021:41 [ref. 38595], Parenti 2021:75 [ref. 38603], Gaye-Siessegger et al. 2022:207 [ref. 40017]). Replacement Name. Current status: Valid as Ponticola kessleri (Günther 1861). Gobiidae: Gobiinae. Distribution: Eurasia: rivers of the Black Sea basin. Introduced elsewhere in Europe (including eastern Baltic Sea). Habitat: freshwater, brackish.