eukaryotes see Domain Eukaryota Chatton, 1925
   Kingdom Chromista Caval.-Sm. (1981) - chromists
     Subkingdom Haptophyta
       Phylum Haptophyta Hibberd ex Caval.-Sm. (1986), nom. inval. see Phylum Haptophyta D.J. Hibberd ex Edvardsen & Eikrem (2000)
         Class Patelliferea Caval.-Sm. (1993)
           Order Prymnesiales Papenfuss (1955)