Natura - nature
  
 actualia - actual entities
    
 Mundus Plinius - physical world
      
 naturalia - natural bodies
        
 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 Chromista Caval.-Sm. (1981) - chromists
                          
 Subkingdom Harosa Cavalier-Smith, 2010
                            
 [halvaria Cavalier-Smith, 2010]
 see Infrakingdom Halvaria Cavalier-Smith, 2010
                              
 [Infrakingdom Heterokonta Caval.-Sm. (1986) - heterokonts]
 see Superphylum Heterokonta Caval.-Sm. (1986)
                                
 [Superphylum Gyrista Caval.-Sm. (1998)]
                                  
 [Phylum Bigyra Caval.-Sm. (1998)]
 see Phylum Bigyra Cavalier-Smith, 1998
                                    
 [Subphylum Pseudofungi Caval.-Sm. (1986) - pseudofungi]
 see Phylum Pseudofungi Caval.-Sm. (1986)
                                      
 [Class Pythiistea Caval.-Sm. (1986)]
                                        
 1 [Subclass Oomycetidae Winter (1879)]
                                        
 2 [Subclass "Hyphochytridae" Caval.-Sm. (1990), nom. inval.]
 see Subclass Hyphochytriomycetidae M.W.Dick (2001)