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 Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
           Order Anseres Linnaeus, 1758 see Suborder Anseres Linnaeus, 1758
             Genus Phaëthon Linnaeus, 1758 see Genus Phaethon Linnaeus, 1758
               1 Phaëthon aethereus Linnaeus, 1758 see Phaethon aethereus Linnaeus, 1758
               2 Phaëthon demersus Linnaeus, 1758