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
               Macrouri Linnaeus, 1758
                 f Macrouri parasitici, cauda setacea aphylla
                 g Macrouri thorace laevi
                 h Macrouri thorace inaequali
                 i Macrouri thorace aculeato
                 k Macrouri, manibus adactylis, thorace oblongo
                 l Macrouri manibus adactylis, testa thoracis brevissima, nec thoracem totum tegente