koster, Acipenser Gmelin [J. F.] 1789:1486 [Caroli a Linné ... Systema Naturae per regna tria naturae v. 1 (pt 3); ref. 18139] Caspian Sea. Appeared first as name only in Gmelin 1774:238 [ref. 18140, v. 3]. •Apparently the same as Acipenser kostera Fitzinger 1832. •Synonym of Acipenser ruthenus Linnaeus 1758 -- (Jouladeh-Roudbar et al. 2020:16 [ref. 37983], Çiçek et al. 2024:29 [ref. 40789]). Current status: Uncertain as Acipenser ruthenus Linnaeus 1758. Acipenseridae. Habitat: freshwater, brackish.