Systema naturæ - nature
   Universum - universe see [unranked] Mundus Plinius
     naturalia - natural bodies
       Regnum Animale nom. inval. - animal kingdom see Kingdom Animalia Linnaeus, 1758
         Class Insecta nom. inval. - insects see Class Insecta Linnaeus, 1758
           Order Aptera nom. inval. see Order Aptera Linnaeus, 1758
             Genus Cancer nom. inval. see Genus Cancer Linnaeus, 1758
               1 Cancer nom. inval.
               2 Astacus nom. inval.
               3 Pagurus nom. inval.
               4 Squilla nom. inval.
               5 Majas nom. inval.
               6 Eremita nom. inval.
               7 Gammarus nom. inval.