haitej, Cottus Dybowski [B. N.] 1869:949, Pl. 14 (fig. 2) [Verhandlungen der K.-K. zoologisch-botanischen Gesellschaft in Wien v. 19; ref. 1169] Onon and Ingoda rivers and their tributaries, Russia. Syntypes: (2) ?BMNH 1871.7.19.9 (1), ZMB 7106 (1). Type catalog: Paepke & Fricke 1992:282 [ref. 19946]. Original as haïtej, correction to haitej required. •Valid as Mesocottus haitej (Dybowski 1869) -- (Berg 1949:1138 [ref. 20662], Sideleva 1982:82 [ref. 14469], Zhu 1995:188 [ref. 25213], Reshetnikov et al. 1997:759 [ref. 24702], Sideleva 1998:153 [ref. 23595], Pietsch et al. 2001:145 [ref. 25688], Bogutskaya et al. 2001:46 [ref. 26178], Parin et al. 2002:S80 [ref. 28300], Bogutskaya & Naseka 2004:190 [ref. 28183], Kottelat 2006:61 [ref. 28831], Ocock et al. 2006:58 [ref. 28933], Bogutskaya et al. 2008:352 [ref. 30085], Goto et al. 2014:[6] [ref. 33456], Parin et al. 2014:259 [ref. 33547], Zhang et al. 2016:194 [ref. 34477], Dyldin & Orlov 2017:65 [ref. 35138], Dyldin et al. 2021:65 [ref. 38804], Dyldin & Orlov 2022:48 [ref. 38972]). Current status: Valid as Mesocottus haitej (Dybowski 1869). Cottidae. Distribution: East Asia: China, Mongolia and Russia. Habitat: freshwater, brackish.