Domain Eucaryota
   Subdomain Chlorota Doweld (2001)
     Kingdom Rhodymeniobiota Starobogatov ex Doweld (2001)
       Subkingdom Rhodymeniobiotina Doweld (2001)
         Phylum Rhodymeniophyta Doweld (2001)
           1 Class Bangiophyceae Wettst. (1901)
           2 Class Rhodymeniophyceae Doweld (2001)