nikolskii, Cottus Berg [L. S.] 1900:346 [21], Pl. 8 (figs. 1-2) [Ezhegodnik, Zoologicheskago Muzeya Imperatorskoi Akademii Nauk v. 5; ref. 14714] Lake Baikal near Selenga River mouth, Russia, depth 840 feet (120 Russian fathoms). Holotype (unique): ZIN 11676. Type catalog: Sideleva & Zhidkov 2021:238 [ref. 38705]. On p. 21 of separate. •Valid as Batrachocottus nikolskii (Berg 1900) -- (Berg 1949:1165 [ref. 20662], Taliev 1955:266 [ref. 4316], Reshetnikov et al. 1997:758 [ref. 24702], Sideleva 1998:150 [ref. 23595], Sideleva 1999:149 [ref. 24864], Vasil'eva 1999:154 [ref. 24864], Bogutskaya et al. 2001:46 [ref. 26178], Sideleva 2001:57 [ref. 26181], Kontula et al. 2003:149 [ref. 26791], Sideleva 2003:15, 158 [ref. 27815], Bogutskaya & Naseka 2004:197 [ref. 28183], Goto et al. 2014:[15] [ref. 33456], Dyldin et al. 2020:115 [ref. 37569], Sideleva & Zhidkov 2021:238 [ref. 38705]). •Valid as Adipocottus nikolskii (Berg 1900) -- (Bogdanov 2023:70 [ref. 40329]). Current status: Valid as Batrachocottus nikolskii (Berg 1900). Cottidae. Distribution: North Asia: Lake Baikal (Russia). Habitat: freshwater.