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
             113 Genus Petromyzon Linnaeus, 1758
             114 Genus Raja Linnaeus, 1758 - skates
             115 Genus Squalus Linnaeus, 1758 - spiny dogfishes
             116 Genus Chimaera Linnaeus, 1758
             117 Genus Lophius Linnaeus, 1758
             118 Genus Acipenser Linnaeus, 1758