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 Spiralia Schleip, 1929
                                          
 Clade Platytrochozoa Struck, Wey-Fabrizius, Golombek, Hering, Weigert, Bleidorn, Klebow, Iakovenko, Hausdorf, Petersen, Kück, Herlyn & Hankeln 2014
                                            
 Clade Lophotrochozoa Halanych, Bacheller, Aguinaldo, Liva, Hillis & Lake 1995 - lophotrochozoans
                                              
 Clade Trochozoa Beklemischev, 1944 - trochozoans
                                                
 Clade Tetraneuralia Wanninger 2009
                                                  
 Phylum Mollusca Linnaeus, 1758 - molluscs
                                                    
 Subphylum Conchifera Gegenbauer, 1878
                                                      
 Ganglioneura Rudophi, 1812
                                                        
 Clade Pleistomollusca Kocot, Cannon, Todt, Citarella, Kohn, Meyer, Santos, Schander, Moroz, Lieb & Halanych 2011
                                                          
 Class Bivalvia Linnaeus, 1758 - bivalves
                                                            
 Subclass Autobranchia Grobben, 1894
                                                              
 Superorder Heteroconchia Gray, 1854
                                                                
 Clade Palaeoheterodonta Newell, 1965
                                                                  
 Order Unionida Gray, 1854
                                                                    
 Superfamily Unionoideaᵀ Rafinesque, 1820
                                                                      
 Family Unionidaeᵀ Rafinesque, 1820 - pearly mussels
                                                                        
 Subfamily Ambleminae Rafinesque, 1820
                                                                          
 Tribe Ambleminiᵀ Rafinesque, 1820
                                                                            
 01 Genus Amblemaᵀ Rafinesque, 1820
                                                                            
 02 Genus Balwantia Prashad, 1919
                                                                            
 03 Genus Coelatura Conrad, 1853
                                                                            
 04 Genus Cokeria Marshall, 1916
                                                                            
 05 Genus Contradens Haas, 1913
                                                                            
 06 Genus Cyclonaias Pilsbry, 1922
                                                                            
 07 Genus Discomya Simpson, 1900
                                                                            
 08 Genus Ensidens Frierson, 1911
                                                                            
 09 Genus Lamellidens Simpson, 1900
                                                                            
 10 Genus Lamprotula Simpson, 1900
                                                                            
 11 Genus Magnonaias Utterback, 1915, nom. rej.
                                                                            
 12 Genus Nitia Pallary, 1924
                                                                            
 13 Genus Orthonymus Agassiz, 1852
                                                                            
 14 Genus Parreysia Conrad, 1853
                                                                            
 15 Genus Plectomerus Conrad, 1853
                                                                            
 16 Genus Popenaias Frierson, 1927
                                                                            
 17 Genus Potomida Swainson, 1840
                                                                            
 18 Genus Pseudobaphia Simpson, 1900
                                                                            
 19 Genus Pseudodon Gould, 1844
                                                                            
 20 Genus Psoronaias Crosse & Fischer, 1894
                                                                            
 21 Genus Quadrula Rafinesque, 1820
                                                                            
 22 Genus Quincuncina Ortmann, 1922
                                                                            
 23 Genus Rhombuniopsis Haas, 1920
                                                                            
 24 Genus Rotundaria Rafinesque, 1820
                                                                            
 25 Genus Schepmania Haas, 1910
                                                                            
 26 Genus Trapezoideus Simpson, 1900
                                                                            
 27 Genus Tritogonia Agassiz, 1852