Kingdom Plantae Haeckel (1866) - plants
   Subkingdom Rhodoplantae G.W.Saunders & Hommers. (2004)
     Phylum Rhodophyta Wettst. (1901) - red algae
       1 Subphylum Rhodellophytina Caval.-Sm. (1998) [monotypic]
       2 Subphylum Metarhodophytina G.W.Saunders & Hommers. (2004) [monotypic]
       3 Subphylum Eurhodophytina G.W.Saunders & Hommers. (2004)