Natura - nature
Status: extant
   actualia - actual entities
  Status: extant
     Mundus Plinius - physical world
    Status: extant
       naturalia - natural bodies
      Status: extant
         Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
        Distribution: cosmopolitan (marine, brackish, freshwater, terrestrial & aerial); Period: Archean - Present (3770 - 0 Mya); Status: extant
           Clade neomura Cavalier-Smith, 1987
          Distribution: cosmopolitan (marine, brackish, freshwater & terrestrial); Period: Archean - Present (3420 - 0 Mya); Status: extant
             Domain Eukaryota Chatton, 1925 - eukaryotes
            Distribution: cosmopolitan (marine, brackish, freshwater & terrestrial); Period: Proterozoic - Present (1650 - 0 Mya); Status: extant
               Clade discaria Cavalier-Smith, 2021
              Distribution: cosmopolitan (marine, brackish, freshwater & terrestrial); Period: Proterozoic - Present [2500 Mya - present]; Status: extant
                 Clade natates Cavalier-Smith, 2021
                Status: extant
                   Clade photaria Cavalier-Smith, 2021
                  Status: extant
                     Clade eucorta Cavalier-Smith, 2021
                    Status: extant
                       Superkingdom Corticata Lankester, 1878 - corticates
                      Status: extant
                         Kingdom Chromista Caval.-Sm. (1981) - chromists
                        Distribution: Asia; Status: extant
                           Subkingdom Harosa Cavalier-Smith, 2010
                          Status: extant
                             Clade Sar Adl et al. 2012 [Simpson & Dunthorn 2020]
                            Status: extant
                               Infrakingdom Halvaria Cavalier-Smith, 2010
                              Status: extant
                                 Superphylum Heterokonta Caval.-Sm. (1986)
                                Status: extant
                                   Phylum Bigyra Cavalier-Smith, 1998
                                  Status: extant
                                     Subphylum Opalozoa Cavalier-Smith, 1992
                                    Status: extant
                                       Infraphylum Placidozoa Cavalier-Smith, 2013
                                      Status: extant
                                         Superclass Opalinata Wenyon, 1926
                                        Status: extant
                                           Class Opalineaᵀ Wenyon, 1926
                                          Status: extant
                                             1 Order Proteromonadida Grassé, 1952 [monotypic]
                                            Status: extant
                                             2 Order Opalinidaᵀ Poche, 1913
                                            Status: extant