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 Limax Linnaeus, 1758
             Genus Doris Linnaeus, 1758
             Genus Tethys Linnaeus, 1758, nom. rej.
             Genus Nereis Linnaeus, 1758
             Genus Aphrodita Linnaeus, 1758
             Genus Lernaea Linnaeus, 1758
             Genus Priapus Linnaeus, 1758, nom. rej. see Genus Priapulus Lamarck, 1816
             Genus Scyllaea Linnaeus, 1758
             Genus Triton Linnaeus, 1758
             Genus Sepia Linnaeus, 1758
             Genus Medusa Linnaeus, 1758
             Genus Asterias Linnaeus, 1758
             Genus Echinus 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)