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 Testacea Linnaeus, 1758
             Genus Murex Linnaeus, 1758
               Varicosi: suturis rotundatis torosis crassisque
                 Murex rana Linnaeus, 1758
                   b Murex rana var. bubo Linnaeus, 1758
                   c Murex rana var. rubeta Linnaeus, 1758