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 Didelphis Linnaeus, 1758 - large American opossums
                 1 Didelphis marſupialis Linnaeus, 1758 - common opossum
                 2 Didelphis Philander Linnaeus, 1758 see Caluromys philander (Linnaeus, 1758)
                 3 Didelphis Oposſum Linnaeus, 1758 see Philander opossum (Linnaeus, 1758)
                 4 Didelphis murina Linnaeus, 1758 see Marmosa murina (Linnaeus, 1758)
                 5 Didelphis dorſigera Linnaeus, 1758