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 Insecta Linnaeus, 1758 - insects
           Order Aptera Linnaeus, 1758
             Genus Cancer Linnaeus, 1758 - cancer crab
               1 Brachyuri Linnaeus, 1758
               2 Macrouri Linnaeus, 1758