chromalveolates see Supergroup Chromalveolata Adl et al., 2005 Kingdom Chromista Caval.-Sm. (1981) - chromists Subkingdom Chromobiota Caval.-Sm. (1991) Infrakingdom Haptophyta Caval.-Sm. (1995) [monotypic] see Subphylum Haptophytina Caval.-Sm. (2015) Phylum Haptophyta D.J. Hibberd ex Edvardsen & Eikrem (2000) see Subphylum Haptophytina Caval.-Sm. (2015) Class Prymnesiophyceae D.J. Hibberd (1976) see Class Coccolithophyceae Rothm. (1951) Genus Prymnesium J. Massart (1920)