rutzskyi, Acipenser ruthenus Johansen [B. G.] 1946:171 [Trudy Tomskogo Gosudarstvennogo Universiteta v. 97; ref. 19607] Upper Ob River, Siberia, Russia. Syntypes: (21). •Synonym of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952] as ruzskyi, Sokolov 1998:21 [ref. 23571] as ruzskyi, Jouladeh-Roudbar et al. 2020:16 [ref. 37983]). Current status: Synonym of Acipenser ruthenus Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish.