Viridiplantae Cavalier-Smith, 1981 - green plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
   Chlorophyta Pascher (1914) - green algae
     core chlorophytes
       Class Trebouxiophyceae T. Friedl (1995) - trebouxiophytes
         Chlorellales
           Genus Prototheca W. Krüger (1894), nom. dub.