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 Nemaliophycidae Christensen (1978)
             Order Palmariales Guiry & D.E.G.Irvine
               Family Rhodothamiellaceae G.W.Saunders & Hommers. (2004), orth. inval. see Family Rhodothamniellaceae G.W.Saunders