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 Arca Linnaeus, 1758
               Margine crenato; Natibus recurvatis
                 143 Arca lactea Linnaeus, 1758 see Striarca lactea (C. Linnaeus, 1758)
                 144 Arca antiquata Linnaeus, 1758
                 145 "245" Arca senilis Linnaeus, 1758
                 146 Arca granosa Linnaeus, 1758
                 147 Arca decussata Linnaeus, 1758
                 148 Arca pallens Linnaeus, 1758