pollux, Cottus Günther [A.] 1873:240 [Annals and Magazine of Natural History (Series 4) v. 12 (no. 69) (art. 31); ref. 2004] River at Otarranai, Japan. Syntypes: BMNH 1873.4.30.1-2 (2). See also Nakabo 2002:1525 [ref. 26001]. •Valid as Cottus pollux Günther 1873 -- (Kuroda 1953:277 [ref. 39545], Watanabe 1960:119 [ref. 11959], Okada 1961:693 [ref. 6363], Yabe in Masuda et al. 1984:326 [ref. 6441], Kawanabe & Mizuno 1989:666 [ref. 25598], Zhu 1995:189 [ref. 25213], Nakabo 2000:638 [ref. 25086], Matsuura et al. 2000:207 [ref. 26000], Nakabo 2002:638 [ref. 26001], Goto et al. 2002:318 [ref. 26495], Hagiwara 2003:37 [ref. 27188], Fujii et al. 2005:12 [ref. 28191], Goto et al. 2014:[9] [ref. 33456], Zhang et al. 2016:193 [ref. 34477]). Current status: Valid as Cottus pollux Günther 1873. Cottidae. Distribution: East Asia: Japan and ?China. Habitat: freshwater.