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 Plantae Haeckel (1866) - plants
                          
 Subkingdom Viridiplantae Caval.-Sm. (1981) - green plants
                            
 Phylum Chlorophyta Pascher (1914) [coordinate rank] - green algae
                              
 "core chlorophytes"
                                
 Class Chlorophyceae Wille (1884) - chlorophytes
                                  
 Order Sphaeropleales Luerssen (1877)
                                    
 Family Hydrodictyaceae Dumort.
                                      
 Genus Pediastrum F.J.F. Meyen (1829)
                                        
 Pediastrum duplex F.J.F. Meyen (1829)
                                          
 Pediastrum duplex var. asperum (A.K.H. Braun, 1855) A. Hansgirg (1886)
                                          
 Pediastrum duplex var. cohaerens (K.H. Bohlin, 1897) A.E. Ergashev (1979)
                                          
 Pediastrum duplex var. cornutum Racib. (1889)
                                          
 Pediastrum duplex var. genuinum (A.K.H. Braun, 1855) N.G. von Lagerheim (1882)
                                          
 Pediastrum duplex var. lividum Racib. (1889)
                                          
 Pediastrum duplex var. montanum D.A. Tarnogradskii (1957)
                                          
 Pediastrum duplex var. punctatum (W. Krieger, 1929) O.O. Parra Barientos (1979)
                                          
 01 Pediastrum duplex f. denticulatum Isabella & R.J. Patel
                                          
 02 Pediastrum duplex var. convexum W. Krieger
                                          
 03.1 Pediastrum duplex var. duplexᵀ F.J.F. Meyen (1829)
                                          
 03.2 Pediastrum duplex var. reticulatum von Lagerheim (1882)
                                          
 04 Pediastrum duplex var. tetraodon
                                          
 05 Pediastrum duplex var. rotundatum Lucks
                                          
 06 Pediastrum duplex var. gracillimum W.West & G.S.West (1895)
                                          
 07 Pediastrum duplex var. irregulare G.R. Hegde & K. Somanna
                                          
 08 Pediastrum duplex var. longicorne W. Krieger
                                          
 09 Pediastrum duplex var. rugulosum Raciborski (1889)
                                          
 10 Pediastrum duplex var. subgranulatum Racib. (1890)