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 Mammalia Linnaeus, 1758 - mammals
           Quadrupedia Linnaeus, 1758 see Class Mammalia Linnaeus, 1758
             Order Beſtiæ Linnaeus, 1758 - beasts
               Genus Sus Linnaeus, 1758 - Eurasian pigs
                 Sus Scrofa Linnaeus, 1758 - wild boar
                   1 [Sus Scrofa α]
                   2 Sus Scrofa β
                   3 Sus Scrofa γ