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 Nemastomatales Kylin
               1 Family Nemastomataceae F.Schmitz (1892), nom. cons.
               2 Family Schizymeniaceae (Schmitz & Hauptfleisch) Masuda & Guiry