Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Clade neomura Cavalier-Smith, 1987
             Domain Eukaryota Chatton, 1925 - eukaryotes
               Clade discaria Cavalier-Smith, 2021
                 Clade natates Cavalier-Smith, 2021
                   Clade photaria Cavalier-Smith, 2021
                     Clade eucorta Cavalier-Smith, 2021
                       Superkingdom Corticata Lankester, 1878 - corticates
                         Kingdom Plantae Haeckel (1866) - plants
                           Clade Rhodaria Cavalier-Smith 2021
                             Subkingdom Rhodoplantae G.W.Saunders & Hommers. (2004) [monotypic]
                               Phylum Rhodophyta Wettst. (1901) - red algae
                                 Subphylum Cyanidiophytina [monotypic]
                                   Class Cyanidiophyceaeᵀ Merola (1982) [monotypic]
                                     Order Cyanidialesᵀ Doweld (2001) [monotypic]
                                       Family Cyanidiaceaeᵀ Geitler (1933)
                                         Genus Cyanidiumᵀ L. Geitler (1933) [monotypic]
                                           Cyanidium caldariumᵀ (Tilden) Geitler