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 Blastocystea Zierdt (1978) [monotypic] see Class Blastocystea Zierdt, 1978 Genus Blastocystis Alexeev (1911)