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
                                                
 Phylum Annelida Lamarck, 1809 - segmented worms
                                                  
 [Clitellata auct.]
 see Class Clitellata Michaelsen, 1919
                                                    
 [Class Hirudinea Lamarck, 1818 - leeches]
 see Subclass Hirudinida
                                                      
 Genus Abessebdella Richardson, 1975
                                                      
 Genus Aetheobdella Moore, 1935
                                                      
 Genus Amicibdella Richardson, 1974
                                                      
 Genus Anphilaemon Richardson, 1979
                                                      
 Genus Bassianobdella Richardson, 1970
                                                      
 Genus Bdellamaris Richardson, 1953
                                                      
 [Order Bdellidea]
                                                      
 Genus Castrabdella Richardson, 1975
                                                      
 Genus Cedbdella Richardson, 1975
                                                      
 Genus Cryobdella Harding, 1922
                                                      
 Genus Cryobdellina Brinkmann, 1948
                                                      
 Genus Dineta Goddard, 1909
                                                      
 Genus Domanibdella Richardson, 1974
                                                      
 Genus Elocobdella Richardson, 1975
                                                      
 Genus Eucryptobdella Richardson, 1975
                                                      
 Genus Eunomobdella Richardson, 1969
                                                      
 Genus Euranophila Richardson, 1969
                                                      
 Genus Fijibdella Richardson, 1975
                                                      
 Genus Galatheabdella Richardson & Meyer, 1973
                                                      
 Genus Goddardobdella Richardson, 1969
                                                      
 Genus Habeobdella Richardson, 1971
                                                      
 Genus Hirudinaria Whitman, 1886
                                                      
 Genus Hirudobdella Goddard, 1910
                                                      
 Genus Ichtyobdella Örsted, 1844
                                                      
 Genus Illebdella Richardson, 1974
                                                      
 Genus Jaabdella Richardson, 1975
                                                      
 Genus Kaiyabdella Richardson, 1972
                                                      
 Genus Keibdella Richardson, 1975
                                                      
 Genus Leiobdella Richardson, 1974
                                                      
 Genus Mahebdella Richardson, 1978
                                                      
 Genus Makarabdella Richardson, 1959
                                                      
 Genus Micobdella Richardson, 1974
                                                      
 Genus Mooreobdellina
                                                      
 Genus Neoterrabdella Richardson, 1969
                                                      
 Genus Notobdella Benham, 1909
                                                      
 [Order Pericœla]
                                                      
 Genus Philaemon
                                                      
 Genus Phytobdella Blanchard, 1894
                                                      
 Genus Placobdelloides Sawyer, 1986
                                                      
 Genus Priscabdella Richardson, 1973
                                                      
 Genus Pterobdella Kaburaki, 1921
                                                      
 Genus Quaesitobdella Richardson, 1975
                                                      
 Genus Quantenobdella Richardson, 1969
                                                      
 Genus Rennlbdella Richardson, 1975
                                                      
 Genus Richardsonianus Soos, 1968
                                                      
 Genus Samoabdella Richardson, 1975
                                                      
 Genus Semilagenta
                                                      
 Genus Sibdella Richardson, 1975
                                                      
 Genus Trachelobdellina
                                                      
 Genus Trulliobdella
                                                      
 Genus Xenobdella Richardson, 1975
                                                      
 1 [Subclass Acanthobdellidea Livanow, 1905 [monotypic]]
 see Subclass Hirudinida
                                                      
 2 [Subclass Euhirudinea Lukin, 1956 - true leeches]
 see Subclass Hirudinida