obensis, Acipenser baeri infra. Johansen [B. G.] 1945:1 [Tomskoe Otdelenie Moskovskago Obshchestva Ispytateley Priody. Tomsk No. 6; ref. 19603] Ob River, at 59.5°N, Russia. Syntypes: (21) not saved. Apparently infrasubspecific and not available. Infrasubspecific. Current status: Synonym of Acipenser. Acipenseridae.