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 Ostrea Linnaeus, 1758 - flat oyster
               * Pectines auriculati, aequales
               ** Pectines auricula altera intus ciliato-spinosa
               *** Pectines valvulis altero latere magis gibbis
               **** Rudes, vulgo Ostrea dictae