chromalveolates see Supergroup Chromalveolata Adl et al., 2005
   Kingdom Chromista Caval.-Sm. (1981) - chromists
     Subkingdom Chromobiota Caval.-Sm. (1991)
       Infrakingdom Heterokonta Caval.-Sm. (1986) - heterokonts see Superphylum Heterokonta Caval.-Sm. (1986)
         Phylum Bigyra Caval.-Sm. (1998) see Phylum Bigyra Cavalier-Smith, 1998
           Subphylum Opalinata Earl (1971) see Superclass Opalinata Wenyon, 1926
             Class Proteromonadea Caval.-Sm. (1997) [monotypic] see Class Opalinea Wenyon (1926)
               1 Genus Proteromonas Kunstler, 1883