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 Florideophyceae Cronquist (1960)
           Subclass Rhodymeniophycidae G.W.Saunders & Hommers. (2004)
             1 Order Bonnemaisoniales Feldmann & Feldm.-Maz. (1942)
             2 Order Ceramiales Oltmanns
             3 Order Gelidiales Kylin
             4 Order Gigartinales F.Schmitz
             5 Order Gracilariales Fredericq & Hommers.
             6 Order Halymeniales G.W.Saunders & Kraft
             7 Order Nemastomatales Kylin
             8 Order Plocamiales G.W.Saunders & Kraft
             9 Order Rhodymeniales F.Schmitz (1892)