Superkingdom Eukaryota Whittaker & Margulis, 1978 see Domain Eukaryota Chatton, 1925
   Kingdom Chlorobiota Jeffrey (1971), nom. inval. see Kingdom Chlorobiota C.Jeffrey ex Doweld (2001)
     Subkingdom Ulvobionta [monotypic]
       Division Ulvophyta F.E. Round (1984), nom. nud. see Phylum Ulvophyta Doweld (2001)
         1 Class "Ulvophyceae" K.R. Mattox & K.D. Stewart (1984) [monophyletic?] - ulvophytes
         2 Class Pleurastrophyceae K.R. Mattox & K.D. Stewart (1984) see Class Trebouxiophyceae T. Friedl (1995)
         3 Class Chlorophyceae Wille (1884) - chlorophytes