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 Pecora Linnaeus, 1758 see Infraorder Pecora Linnaeus, 1758
               Genus Ovis Linnaeus, 1758 - sheep
                 1 Ovis Aries Linnaeus, 1758 - domestic sheep
                 2 Ovis guineenſis Linnaeus, 1758
                 3 Ovis Strepſiceros Linnaeus, 1758