Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [Regnum Animale C. Linnaeus, 1758 - animal kingdom] see Kingdom Animalia Linnaeus, 1758
           [Aranei C. Clerck, 1757]
           ["Aranei"] see [unranked] Aranei C. Clerck, 1757
           2.1 [Class Vermes Linnaeus, 1758 - worms] see Phylum Vermes (C. Linnaeus, 1758)