chatys, Acipenser baeri Dryagin [P. A.] 1948:532 [Zoologicheskii Zhurnal v. 27 (no. 6); ref. 13007] From Lena to Kolyma rivers, Sakha-Yakutia, northeastern Russia. Syntypes: (27). •Synonym of Acipenser baerii Brandt 1869 -- (Kottelat 2006:15 [ref. 28831]). •Synonym of Acipenser baerii Brandt 1869, but a valid subspecies chatys as described -- (Sokolov 1998:20 [ref. 23571], Bogutskaya & Naseka 2004:23 [ref. 28183], Romanov et al. 2017:820 [ref. 35687], Jouladeh-Roudbar et al. 2020:13 [ref. 37983]). •Synonym of Huso baerii (Brandt 1869). Current status: Synonym of Huso baerii (Brandt 1869). Acipenseridae. Habitat: freshwater, brackish.