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 Gastropoda Cuvier, 1795 - snails and slugs
                                                            
 Subclass Orthogastropoda Ponder & Lindberg, 1995
                                                              
 Apogastropoda Salvini-Plawen & Haszprunar, 1987
                                                                
 Superorder Heterobranchia Burmeister, 1837
                                                                  
 Euthyneura Spengel, 1881
                                                                    
 Tectipleura Schrödl, Jörger, Klussmann-Kolb & Wilson, 2011
                                                                      
 Panpulmonata Jörger, Stöger, Kano, Fukuda, Knebelsberger & Schrödl, 2010
                                                                        
 Order Eupulmonata Haszprunar & Huber, 1990
                                                                          
 Suborder Stylommatophora Schmidt, 1855 - higher pulmonates
                                                                            
 Informal Group "Sigmurethra" Pilsbry, 1900
                                                                              
 "limacoid clade"
                                                                                
 Superfamily Helicarionoidea Bourguignat, 1877
                                                                                  
 Family Urocyclidae Simroth, 1889
                                                                                    
 Subfamily Urocyclinaeᵀ Simroth, 1889
                                                                                      
 Genus Amatarion van Mol, 1970
                                                                                      
 Genus Anisotoxon van Goethem, 1975
                                                                                      
 Genus Aspidelus Morelet, 1883
                                                                                      
 Genus Aspidotomium Degner, 1932
                                                                                      
 Genus Atoxonoides van Goethem, 1973
                                                                                      
 Genus Bukobia Simroth, 1896
                                                                                      
 Genus Camerunarion van Mol, 1970
                                                                                      
 Genus Chlamydarion van Mol, 1968
                                                                                      
 Genus Elisolimax Cockerell, 1893
                                                                                      
 Genus Estria Poirier, 1887
                                                                                      
 Genus Kirkia Pollonera, 1909
                                                                                      
 Genus Leptichnoides van Goethem, 1975
                                                                                      
 Genus Nupnus van Goethem, 1975
                                                                                      
 Genus Pembatoxon van Goethem, 1975
                                                                                      
 Genus Phaneroporus Simroth, 1888
                                                                                      
 Genus Pseudatoxon van Goethem, 1975
                                                                                      
 Genus Rhopalogonium Degner, 1932
                                                                                      
 Genus Senegalarion van Mol, 1970
                                                                                      
 Genus Sylvarion van Mol, 1970
                                                                                      
 Genus Thielarion van Mol, 1970
                                                                                      
 Genus Tresia van Goethem, 1975
                                                                                      
 Genus Trichotoxon Simroth, 1888
                                                                                      
 Genus Verdcourtia van Mol, 1970
                                                                                      
 Genus Verrucarion van Mol, 1970
                                                                                      
 1 Tribe Urocycliniᵀ Simroth, 1889
                                                                                      
 2 Tribe Dendrolimacini van Goethem, 1977
                                                                                      
 3 Tribe Leptichnini van Goethem, 1977
                                                                                      
 4 Tribe Upembellini van Goethem, 1977