dubius, Acipenser Heckel [J. J.] in Fitzinger & Heckel 1836:276 [Annalen des Wiener Museums der Naturgeschichte v. 1 (no. 12); ref. 2077] Not available, name only in synonymy of Acipenser gmelini Fitzinger 1836. •In the synonymy of Acipenser ruthenus Linnaeus 1758 -- (Kottelat 1997:32 [ref. 22952] based on Brusina 1902). Nomen Nudum. Current status: Synonym of Vacuoqua ruthenus (Linnaeus 1758). Acipenseridae.