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 Medusa Linnaeus, 1758
               01 Medusa porpita Linnaeus, 1758
               02 Medusa cruciata Linnaeus, 1758
               03 Medusa aequorea Linnaeus, 1758
               04 Medusa aurita Linnaeus, 1758
               05 Medusa capillata Linnaeus, 1758
               06 Medusa pilearis Linnaeus, 1758
               07 Medusa marsupialis Linnaeus, 1758
               08 Medusa pelagica Linnaeus, 1758
               09 Medusa brachiata Linnaeus, 1758
               10 Medusa beroe Linnaeus, 1758
               11 Medusa velella Linnaeus, 1758