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
           Pinnata Linnaeus, 1758 see Class Mammalia Linnaeus, 1758
             Order Cete Linnaeus, 1758 see Order Cetartiodactyla Montgelard, Catzeflis & Douzery, 1997
               Genus Phyſeter Linnaeus, 1758 - sperm whale
                 1 Physeter catodon Linnaeus, 1758 - sperm whale see Physeter macrocephalus Linnaeus, 1758
                 2 Physeter macrocephalus Linnaeus, 1758 - sperm whale
                 3 Physeter microps Linnaeus, 1758
                 4 Physeter tursio Linnaeus, 1758