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) 1 Class Coccolithophyceae Rothm. (1951) 2 Class Pavlovophyceae J.C. Green & Medlin (2000) 3 Class Rappephyceae Caval.-Sm. (2015)