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
               1 Holothuria physalis Linnaeus, 1758 see Physalia physalis (C. Linnaeus, 1758) Totton, 1965
               2 Holothuria thalia Linnaeus, 1758 see Cyclosalpa pinnata (Forskål, 1775)
               3 Holothuria caudata Linnaeus, 1758 see Cyclosalpa pinnata (Forskål, 1775)
               4 Holothuria denudata Linnaeus, 1758 see Cyclosalpa pinnata (Forskål, 1775)