Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Biota
           "neomura"
             Domain Eukaryota Chatton, 1925 - eukaryotes
               neokaryotes Cavalier-Smith 1993 - mitochondrial eukaryotes
                 neozoa Cavalier-Smith 1993
                   Superkingdom Corticata Lankester, 1878
                     Kingdom Plantae Haeckel (1866) - plants
                       Phylum Rhodophyta Wettstein (1922) - red algae
                         Subphylum Macrorhodophytina T. Cavalier-Smith (1998)
                           Class Bangiophyceae
                             Order Bangialesᵀ
                               Family Bangiaceaeᵀ
                                 Genus Porphyraᵀ C. Agardh (1824)
                                   Porphyra umbilicalis (Linnaeus) J.G. Agardh