Systema naturæ - nature
   Universum - universe see [unranked] Mundus Plinius
     naturalia - natural bodies
       Regnum Animale nom. inval. - animal kingdom see Kingdom Animalia Linnaeus, 1758
         Class Pisces nom. inval. - fishes see Class Pisces Linnaeus, 1758
           Order Plagiuri nom. inval. see Class Mammalia Linnaeus, 1758
             Genus Monodon Artedi, nom. inval. see Genus Monodon Linnaeus, 1758
               Unicornu nom. inval. see Monoceros nom. inval.