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 Vermes Linnaeus, 1758 - worms see Phylum Vermes (C. Linnaeus, 1758)
           Order Mollusca Linnaeus, 1758 see Phylum Mollusca Linnaeus, 1758
             Genus Holothuria Linnaeus, 1758, nom. rej. see Genus Physalia Lamarck, 1801
               Holothuria physalis Linnaeus, 1758 see Physalia physalis (C. Linnaeus, 1758) Totton, 1965