[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Eukaryota Chatton, 1925 - eukaryotes see Domain Eukaryota Chatton, 1925
     Supergroup Chromalveolata Adl et al., 2005 - chromalveolates see Kingdom Chromista Caval.-Sm. (1981)
       Haptophyta D.J. Hibberd ex Edvardsen & Eikrem (2000) see Subphylum Haptophytina Caval.-Sm. (2015)
         Prymnesiophyceae D.J. Hibberd (1976) see Class Coccolithophyceae Rothm. (1951)
           1 Prymnesiales Papenfuss (1955)
           2 Phaeocystales Medlin (2000)
           3 Isochrysidales Pascher (1910) see Order Isochrysidales Pascher sensu Edvardsen & Eikrem (2000)
           4 Coccolithales Schwarz (1932)