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 Pholas Linnaeus, 1758
               10 Pholas dactylus Linnaeus, 1758 - European piddock
               11 Pholas costatus Linnaeus, 1758
               12 Pholas striatus Linnaeus, 1758
               13 Pholas candidus Linnaeus, 1758
               14 Pholas pusillus Linnaeus, 1758