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 dorsates Cavalier-Smith, 2021
                  
 Clade podiates Cavalier-Smith, 2012
                    
 Clade Amorphea Adl et al. 2012 [Simpson, Medina & Adl 2020]
                      
 Clade Obazoa Brown, Sharpe, Silberman, Heiss, Lang, Simpson & Roger 2013
                        
 Clade Opisthokonta Cavalier-Smith 1987 [Simpson & Medina 2020] - animal-fungal clade
                          
 Superkingdom Holozoa Lang, O'Kelly, Nerad, Gray & Burger, 2002
                            
 Clade filozoa Shalchian-Tabrizi, Minge, Espelund, Orr, Ruden, Jakobsen & Cavalier-Smith, 2008
                              
 Kingdom Animalia Linnaeus, 1758 - animals
                                
 Clade Planulozoa Wallberg, Thollesson, Farris & Jondelius 2004
                                  
 Subkingdom Bilateria Hatschek, 1888 - bilaterians
                                    
 Clade Nephrozoa Jondelius, Ruiz-Trillo, Baguñà & Riutort 2002
                                      
 Infrakingdom Protostomia Grobben, 1908
                                        
 Superphylum Ecdysozoa Aguinaldo, Turbeville, Linford, Rivera, Garey, Raff & Lake, 1997
                                          
 Panarthropoda Nielsen, 1995 - panarthropods
                                            
 Tactopoda Budd, 2001
                                              
 Phylum Arthropoda Siebold, 1848 - arthropods
                                                
 Euarthropoda
                                                  
 Antennulata
                                                    
 Subphylum Mandibulata Snodgrass, 1938
                                                      
 Infraphylum Pancrustacea Zrzavý & Štys, 1997
                                                        
 Altocrustacea
                                                          
 Vericrustacea
                                                            
 Multicrustacea
                                                              
 Communostraca
                                                                
 Subclass Thecostraca Gruvel, 1905 - barnacles
                                                                  
 Infraclass Cirripedia Burmeister, 1834 - barnacles
                                                                    
 Genus †Actinobalanus Moroni, 1967
                                                                    
 Genus †Aporolepas Withers, 1953
                                                                    
 Genus †Archaeolepas Zittel, 1884
                                                                    
 Genus †Archoxynaspis Van Syoc & Dekelboum, 2011
                                                                    
 Genus Arossia Newman, 1982
                                                                    
 Genus Austrobalanus Pilsbry, 1916
                                                                    
 Genus Austromegabalanus
                                                                    
 Genus †Blastolepas Drushchits & Zevina, 1969
                                                                    
 Genus †Brachylepas Woodward, 1901
                                                                    
 Genus Calantica Gray, 1825
                                                                    
 Genus †Ceratoconcha Kramberger-Gorjanovic, 1889
                                                                    
 Genus Chamaesipho Darwin, 1854
                                                                    
 Genus †Chesaconcavus Zullo, 1992
                                                                    
 Genus Concavus Newman, 1982
                                                                    
 Genus Creusia Leach, 1817
                                                                    
 Genus †Emersonius Ross & Newman, 1967
                                                                    
 Genus †Endosacculus Voigt, 1959
                                                                    
 Genus †Eoceratoconcha Newman & Ladd, 1974
                                                                    
 Genus †Eolasma Buckeridge, 1983
                                                                    
 Genus †Eolepas Withers, 1928
                                                                    
 Genus †Eoverruca Withers, 1935
                                                                    
 Genus Epopella Ross, 1970
                                                                    
 Genus Fistulobalanus Zullo, 1984
                                                                    
 Genus †Fosterella Buckeridge, 1983
                                                                    
 Genus Graviscalpellum Foster, 1980
                                                                    
 Genus Hesperibalanus Pilsbry, 1916
                                                                    
 Genus Ilba
                                                                    
 Genus †Illilepas Schram, 1986
                                                                    
 Genus †Kathpalmeria Ross, 1965
                                                                    
 Genus †Lophobalanus Zullo, 1984
                                                                    
 Genus †Loriculina Dames, 1885
                                                                    
 Genus †Mclellania Wilson, 1983
                                                                    
 Genus Mesolasma Foster, 1981
                                                                    
 Genus Minyaspis Van Syoc & Dekelboum, 2011
                                                                    
 Genus †Neolepas Newman, 1979
                                                                    
 Genus †Notobalanus Newman & Ross, 1976
                                                                    
 Genus †Pachydiadema Withers, 1935
                                                                    
 Genus †Palaeobalanus Buckeridge, 1983
                                                                    
 Genus Paraconcavus Zullo, 1992
                                                                    
 Genus †Priscanermarinus
                                                                    
 Genus †Proverruca Withers, 1914
                                                                    
 Genus †Pycnolepas Withers, 1914
                                                                    
 Genus Rogerella Saint-Seine, 1951
                                                                    
 Genus †Schreteriella
                                                                    
 Genus †Stramentum Logan, 1897
                                                                    
 Genus Tamiosoma Conrad, 1856
                                                                    
 Genus †Tasmanobalanus Buckeridge, 1983
                                                                    
 Genus †Tesseroplax Ross, 1969
                                                                    
 Genus †Tetrinis Hirt, 1992
                                                                    
 Genus †Titanolepas Withers, 1913
                                                                    
 Genus †Virgiscalpellum Withers, 1935
                                                                    
 Genus †Waikalasma Buckeridge, 1983
                                                                    
 Genus †Waiparaconus Buckeridge, 1983
                                                                    
 Genus †Zeascalpellum Buckeridge, 1983
                                                                    
 Genus †Zeugmatolepas Withers, 1913
                                                                    
 1 Superorder Acrothoracica Gruvel, 1905
                                                                    
 2 Superorder Rhizocephala Müller, 1862
                                                                    
 3 Superorder Thoracica Darwin, 1854