annularis, Chaenogobius Gill [T. N.] 1859:12 [1] [Annals of the Lyceum of Natural History of New York v. 7 (nos 1-3, art. 3); ref. 1751] Hakodate, Hokkaido, Japan. Holotype (unique): USNM 6336. Rear Dec. 1858, apparently publsihed in 1859; date on jacket is 1863. On p. 1 of separate. •Synonym of Chaenogobius urotaena (Hilgendorf 1879) -- (Kim 1997:581 [ref. 24032] as urotaenius, Choi et al. 2003:659 [ref. 26218] as urotaenia). •Valid as Chaenogobius annularis Gill 1859 -- (Okada 1961:676 [ref. 6363], Zhu 1995:179 [ref. 25213], Cheng & Zhou 1997:374 [ref. 26385], Reshetnikov et al. 1997:753 [ref. 24702], Vasil'eva 1998:132 [ref. 23591], Stevenson 2000:835 [ref. 24583], Nakabo 2000:1197 [ref. 25182], Nakabo 2002:1197 [ref. 26193], Stevenson 2002:259 [ref. 26489], Hagiwara 2003:38 [ref. 27188], Bogutskaya & Naseka 2004:220 [ref. 28183], Motomura et al. 2010:208 [ref. 31256], Matsui et al. 2014:11 [ref. 33344], Kwun et al. 2017:143 [ref. 37287], Kim et al. 2020:169 [ref. 39118], Sonoyama et al. 2020:103 [ref. 37637], Parenti 2021:294 [ref. 38603]). Current status: Valid as Chaenogobius annularis Gill 1859. Oxudercidae: Gobionellinae. Distribution: Northwestern Pacific: Korea and Japan. Habitat: freshwater.