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 Deuterostomia Grobben, 1908
                                        
 Phylum Chordata Bateson, 1885 - chordates
                                          
 Subphylum Craniata auct.
                                            
 Infraphylum Vertebrata Lamarck, 1801 - vertebrates
                                              
 Clade Pan-Gnathostomata Downs 2020
                                                
 Superclass Gnathostomataᵀ Gegenbaur, 1874 - jawed vertebrates
                                                  
 [crown] Clade Eugnathostomata
                                                    
 Clade Pan-Osteichthyes Rowe 2004 [Moore & Near 2020]
                                                      
 Clade Osteichthyes Huxley 1880 [Moore & Near 2020]
                                                        
 Clade Pan-Sarcopterygii
                                                          
 Clade Sarcopterygii Romer, 1955
                                                            
 Clade Dipnotetrapodomorpha Nelson, 2006
                                                              
 Clade Rhipidistia Cope, 1887
                                                                
 Clade Tetrapodomorpha Ahlberg, 1991
                                                                  
 Clade Osteolepidida Boulenger 1901 [Cloutier & Ahlberg 1996]
                                                                    
 Clade Eotetrapodiformes Coates & Friedman, 2010
                                                                      
 [crown] Clade Elpistostegalia Camp & Allison, 1961
                                                                        
 Clade Stegocephali Cope 1868 [Laurin 2020]
                                                                          
 Clade Labyrinthodontia Owen 1859 [Laurin 2020]
                                                                            
 Clade Tetrapoda Hatschek & Cori 1896 [Laurin 2020]
                                                                              
 Clade Pan-Amniota Rowe 2004 [Laurin & Smithson 2020]
                                                                                
 Clade Batrachosauria
                                                                                  
 Clade Amniota Haeckel 1866 [Laurin & Reisz 2020]
                                                                                    
 Class Reptilia Linnaeus, 1758 - reptiles
                                                                                      
 Clade Eureptilia Olson, 1947
                                                                                        
 Clade Romeriida Gauthier, Kluge & Rowe, 1988
                                                                                          
 Clade Diapsida Osborn 1903 [Gauthier & de Queiroz 2020]
                                                                                            
 Clade Neodiapsida Benton 1985
                                                                                              
 Clade Pan-Archelosauria W.G. Joyce, J. Anquetin, E. Cadena, J. Claude, I.G. Danilov, S.W. Evers, ..., J.F. Parham 2021, sedis mutabilis
                                                                                                
 Clade Archelosauria N.G. Crawford, J.F. Parham, A.B. Sellas, B.C. Faircloth, T.C. Glenn, T.J. Papenfuss, ..., W.B. Simison 2015 [W.G. Joyce, J. Anquetin, E. Cadena, J. Claude, I.G. Danilov, S.W. Evers, ..., J.F. Parham 2021]
                                                                                                  
 Clade Pan-Archosauria Gauthier 2020
                                                                                                    
 Clade Archosauromorpha von Huene 1946 [Gauthier 2020]
                                                                                                      
 Clade Crocopoda Ezcurra 2016
                                                                                                        
 Clade Archosauriformes Gauthier 1994 [Gauthier 2020]
                                                                                                          
 Clade Crurotarsi Sereno & Arcucci 1990
                                                                                                            
 Clade Archosauriaᵀ Cope 1869 [Gauthier & Padian 2020]
                                                                                                              
 Clade Pseudosuchia Zittel 1887-1890 [Gauthier & Padian 1985]
                                                                                                                
 Clade Suchiaᵀ Krebs 1974 [Sereno 1991]
                                                                                                                  
 Clade Paracrocodylomorphaᵀ Parrish 1993
                                                                                                                    
 Clade Loricataᵀ Merrem 1820 [Nesbitt 2011]
                                                                                                                      
 Subclass Crocodylomorphaᵀ Hay, 1930
                                                                                                                        
 Clade Crocodyliformesᵀ Clark 1988 [Sereno, Larsson, Sidor & Gado 2001]
                                                                                                                          
 Clade Mesoeucrocodyliaᵀ Whetstone & Whybrow 1983 [Sereno, Larsson, Sidor & Gado 2001]
                                                                                                                            
 Clade Metasuchia Benton & Clark 1988 [Sereno, Larsson, Sidor & Gado 2001]
                                                                                                                              
 Clade Neosuchia Benton & Clark 1988 [Sereno, Larsson, Sidor & Gado 2001]
                                                                                                                                
 Clade Eusuchia Huxley 1875 {Brochu 2003}
                                                                                                                                  
 Order Crocodylia Wagler, 1830 - crocodiles
                                                                                                                                    
 Clade Brevirostres von Zittel 1890 [Brochu 2003]
                                                                                                                                      
 Superfamily Alligatoroidea Cuvier, 1807
                                                                                                                                        
 Clade Globidonta Brochu 1999 [Brochu 1999]
                                                                                                                                          
 [crown] Family Alligatoridaeᵀ Cuvier, 1807
                                                                                                                                            
 Subfamily Caimaninae Brochu, 1999
                                                                                                                                              
 Genus †Eocaiman Simpson, 1933 [monotypic]
                                                                                                                                                
 †Eocaiman cavernensisᵀ Simpson, 1933