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
             1 Genus Thrichechus nom. inval. see Genus Trichechus Linnaeus, 1758
             2 Genus Catodon nom. inval. see Genus Physeter Linnaeus, 1758
             3 Genus Monodon Artedi, nom. inval. see Genus Monodon Linnaeus, 1758
             4 Genus Balaena nom. inval. see Genus Balaena Linnaeus, 1758
             5 Genus Delphinus nom. inval. see Genus Delphinus Linnaeus, 1758