Imperium naturæ C. Linnaeus, 1758 - nature
   Mundus Plinius - physical world
     naturalia - natural bodies
       Regnum Animale C. Linnaeus, 1758 - animal kingdom see Kingdom Animalia Linnaeus, 1758
         Class Amphibia Linnaeus, 1758 - amphibians see Class Amphibia Gray, 1825
           Order Nantes Linnaeus, 1758
             Genus Acipenser Linnaeus, 1758
               1 Acipenser sturio Linnaeus, 1758 - common sturgeon
               2 Acipenser ruthenus Linnaeus, 1758 - sterlet
               3 Acipenser huso Linnaeus, 1758 see Huso huso (C. Linnaeus, 1758)
               4 Acipenser plecostomus Linnaeus, 1758 see Hypostomus plecostomus (C. Linnaeus, 1758)