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 supra spinoso
                   24 Cancer maja Linnaeus, 1758
                   25 Cancer longimanus Linnaeus, 1758
                   26 Cancer horridus Linnaeus, 1758
                   27 Cancer cristatus Linnaeus, 1758
                   28 Cancer superciliosus Linnaeus, 1758
                   29 Cancer cornutus Linnaeus, 1758
                   30 Cancer longipes Linnaeus, 1758
                   31 Cancer spinifer Linnaeus, 1758