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
               Brachyuri Linnaeus, 1758
                 Brachyuri thorace inaequali
                   32 Cancer cruentatus Linnaeus, 1758
                   33 Cancer hepaticus Linnaeus, 1758
                   34 Cancer calappa Linnaeus, 1758
                   35 Cancer grapsus Linnaeus, 1758
                   36 Cancer aeneus Linnaeus, 1758
                   37 Cancer punctatus Linnaeus, 1758
                   38 Cancer dorsipes Linnaeus, 1758
                   39 Cancer symmysta Linnaeus, 1758