life see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Empire Eukaryota (Chatton, 1925) see Domain Eukaryota Chatton, 1925
     Superkingdom Metakaryota see Domain Eukaryota Chatton, 1925
       Kingdom Chromista Caval.-Sm. (1981) - chromists
         Subkingdom Euchromista Cavalier-Sm. (1993) see [unranked] Stramenopila
           Infrakingdom Chromobiota Caval.-Sm. (1986)
             Phylum Haptophyta Hibberd ex Caval.-Sm. (1986), nom. inval. see Phylum Haptophyta D.J. Hibberd ex Edvardsen & Eikrem (2000)
               1 Class Patelliferea Caval.-Sm. (1993)
               2 Class Pavlovea Caval.-Sm. (1986)