nihonkaiensis, Cottiusculus Kai [Y.] & Nakabo [T.] 2009:215, Figs. 1-3 [Ichthyological Research v. 56 (no. 3); ref. 30299] Off Tango Peninsula, Kyoto Prefecture, Japan. Holotype: FAKU 130664. Paratypes: (31) at FAKU, NSMT. •Valid as Cottiusculus nihonkaiensis Kai & Nakabo 2009 -- (Shinohara et al. 2014:249 [ref. 33330], Parin et al. 2014:240 [ref. 33547], Kim et al. 2020:101 [ref. 39118], Prokofiev 2020:13 [ref. 37765], Sonoyama et al. 2020:89 [ref. 37637], Dyldin & Orlov 2022:41 [ref. 38972], Jin et al. 2023:143 [ref. 40382]). Current status: Valid as Cottiusculus nihonkaiensis Kai & Nakabo 2009. Psychrolutidae. Distribution: Northwestern Pacific: Sea of Japan (Korea, Japan, Russia), northern Hokkaido (Japan) and Korean Peninsula. Habitat: marine.