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 Cardium Linnaeus, 1758
               58 Cardium costatum Linnaeus, 1758
               59 Cardium cardissa Linnaeus, 1758
               60 Cardium hemicardium Linnaeus, 1758
               61 Cardium medium Linnaeus, 1758
               62 Cardium muricatum Linnaeus, 1758 see Acanthocardia aculeata (C. Linnaeus, 1767)
               63 Cardium echinatum Linnaeus, 1758 see Acanthocardia echinata (C. Linnaeus, 1758)
               64 Cardium ciliare Linnaeus, 1758
               65 Cardium tuberculatum Linnaeus, 1758 see Acanthocardia tuberculata (C. Linnaeus, 1758)
               66 Cardium isocardia Linnaeus, 1758
               67 Cardium fragum Linnaeus, 1758
               68 Cardium unedo Linnaeus, 1758
               69 Cardium muricatum Linnaeus, 1758
               70 Cardium magnum Linnaeus, 1758
               71 Cardium flavum Linnaeus, 1758
               72 Cardium laevigatum Linnaeus, 1758
               73 Cardium serratum Linnaeus, 1758
               74 Cardium triste Linnaeus, 1758
               75 Cardium corallinum Linnaeus, 1758
               76 Cardium solidum Linnaeus, 1758
               77 Cardium edule Linnaeus, 1758 see Cerastoderma edule (C. Linnaeus, 1758)
               78 Cardium rusticum Linnaeus, 1758
               79 Cardium pectinatum Linnaeus, 1758
               80 Cardium stultorum Linnaeus, 1758
               81 Cardium virgineum Linnaeus, 1758
               82 Cardium humanum Linnaeus, 1758