pygmaeus, Acipenser Pallas [P. S.] 1814:102 [Zoographia Rosso-Asiatica v. 3; ref. 3351] Major seas and rivers of Europe. No types known. For localities see Kottelat 1997:31 [ref. 22952]. •Synonym of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:31 [ref. 22952], Sokolov 1998:21 [ref. 23571], Jouladeh-Roudbar et al. 2020:16 [ref. 37983]). •Synonym of Huso ruthenus (Linnaeus 1758). Current status: Synonym of Huso ruthenus (Linnaeus 1758). Acipenseridae. Habitat: freshwater, brackish.