Systema naturæ - nature
   Universum - universe see [unranked] Mundus Plinius
     naturalia - natural bodies
       Regnum Animale nom. inval. - animal kingdom see Kingdom Animalia Linnaeus, 1758
         Class Quadrupedia nom. inval. - quadrupeds see Class Mammalia Linnaeus, 1758
           Order Ferae nom. inval. see Order Ferae Linnaeus, 1758
             Genus Didelphis nom. inval. see Genus Didelphis Linnaeus, 1758
               1 Philander nom. inval.
               1.0 Possum nom. inval. see Philander nom. inval.