eukaryotes see Domain Eukaryota Chatton, 1925
   Superkingdom Corticata Lankester, 1878 - corticates
     Kingdom Chromista Caval.-Sm. (1981) - chromists
       Subkingdom Hacrobia Okamoto, Chantangsi, Horák, Leander & Keeling, 2009
         Phylum Haptista Cavalier-Smith, 2003
           Subphylum Haptophytina Caval.-Sm. (2015)
             Class Pavlovophyceae J.C. Green & Medlin (2000)
               1 Genus Diacronema Prauser (1958)
               2 Genus Pavlova R. Butcher (1952)