Kingdom Plantae Haeckel (1866) - plants
   Subkingdom Rhodoplantae G.W.Saunders & Hommers. (2004)
     Phylum Rhodophyta Wettst. (1901) - red algae
       Subphylum Eurhodophytina G.W.Saunders & Hommers. (2004)
         Class Bangiophyceae Wettst. (1901) [monotypic]
           Order Bangiales Nägeli (1847) [monotypic]
             Genus Porphyra C.Agardh (1824), nom. cons.