tanaica, Acipenser gueldenstadti var. Marty [V. J.] 1940:863 [Zoologicheskii Zhurnal v. 19 (no. 6); ref. 17607] Taganrog Bay, Sea of Azov, Russia. Syntypes: (many). Bogutskaya & Naseka 2004:23 [ref. 28183] date tanaica to Movchan 1927 as a natio (needs research). •Synonym of Acipenser gueldenstaedti Brandt & Ratzeburg 1833, subspecies cochicus Marty 1940 -- (Berg 1948:84 [ref. 12882], Svetovidov 1973:83 [ref. 7169]). •Synonym of Acipenser gueldenstaedtii Brandt & Ratzeburg 1833 -- (Kottelat 1997:30 [ref. 22952], Bogutskaya & Naseka 2004:23 [ref. 28183], Jouladeh-Roudbar et al. 2020:14 [ref. 37983]). •Synonym of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Current status: Synonym of Huso gueldenstaedtii (Brandt & Ratzeburg 1833). Acipenseridae. Habitat: freshwater, brackish, marine.