Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Chordata Bateson, 1885 - chordates
     Class Actinopterygii Woodward, 1891 - ray-finned fishes
       Order Acipenseriformes Berg, 1940 - sturgeons
         Family Acipenseridae Bonaparte, 1832 - sturgeons
           Genus Acipenser Linnaeus, 1758
             Acipenser baerii Brandt, 1869
               Acipenser baerii baeriiᵀ Brandt, 1869 - Siberian sturgeon
               Acipenser baerii baikalensis Nikolskii, 1896 see Acipenser baerii baicalensis Nikolskii, 1896
               Acipenser baerii stenorrhynchus Nikolskii, 1896 - Lena River sturgeon