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)
             Order Rhodymeniales F.Schmitz (1892)
               1 Family Champiaceae Kützing (1843)
               2 Family Faucheaceae Saunders et al. (1999)
               3 Family Lomentariaceae Willk. (1854), nom. cons.
               4 Family Rhodymeniaceae Harvey (1849)