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 Sagenista Caval.-Sm. (1995) see Subphylum Sagenista Cavalier-Smith, 1995 Class Placididea Moriya, Nakayama & Inouye, 2002 Genus Placidia Moriya, Nakayama & Inouye, 2002