baicalensis, Acipenser stenorrhynchus var. Nikolskii [A. M.] 1896:401 [Ezhegodnik, Zoologicheskago Muzeya Imperatorskoi Akademii Nauk v. 1; ref. 14614] Lake Baikal, Siberia, Russia. Syntypes: MLSU 1631 (1), ZIN 10641 (2). •Synonym of Acipenser baerii Brandt 1869 -- (Berg 1948:86 [ref. 12882], Kottelat 2006:15 [ref. 28831]). •Synonym of Acipenser baerii Brandt 1869, but a valid subspecies baicalensis Nikolskii 1896 as described -- (Reshetnikov et al. 1997:726 [ref. 24702], Sokolov 1998:20 [ref. 23571], Sideleva 2001:45 [ref. 26181], Sideleva 2003:8 [ref. 27815], Ocock et al. 2006:26 [ref. 28933], Romanov et al. 2017:820 [ref. 35687], Dyldin et al. 2020:102 [ref. 37569], Jouladeh-Roudbar et al. 2020:13 [ref. 37983]). Current status: Synonym of Acipenser baerii Brandt 1869. Acipenseridae. Habitat: freshwater, brackish.