Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         ["Animale Regnum" 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 "Balaena" nom. inval.] see Genus Balaena Linnaeus, 1758
                 ["Balæna albicans" Klein, 1741, nom. inval.] see Physeter macrocephalus albicans Kerr, 1792