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
                                                                
 Class Malacostraca Latreille, 1802
                                                                  
 Subclass Eumalacostraca Grobben, 1892
                                                                    
 Superorder Peracarida Calman, 1904
                                                                      
 Order Tanaidacea Dana, 1849 - tanaids
                                                                        
 Suborder Apseudomorpha Sieg, 1980
                                                                          
 Superfamily Apseudoideaᵀ (Leach, 1814) Schram et al., 1986
                                                                            
 Family Apseudidaeᵀ Leach, 1814
                                                                              
 Subfamily Apseudinaeᵀ Leach, 1814
                                                                                
 01 Genus Annexos Blazewicz-Paszkowycz & Bamber, 2007 [monotypic]
                                                                                
 02.1 Genus Apseudesᵀ Leach, 1814
                                                                                
 02.2 Genus Androgynella Gutu, 2006, nom. illeg.
                                                                                
 02.3 Genus Apseudopsis Norman & Stebbing [Norman, 1899]?
                                                                                
 02.4 Genus Bilobatus Sieg, 1993
                                                                                
 03 Genus Atlantapseudes Bacescu, 1978
                                                                                
 04 Genus Bunakenia Gutu, 1995
                                                                                
 05 Genus Collossella Józwiak & Blazewicz-Paszkowycz, 2007
                                                                                
 06 Genus Dactyloprion Gutu, 2002 [monotypic]
                                                                                
 07 Genus Falsapseudes Gutu, 2006 [monotypic]
                                                                                
 08 Genus Glabroapseudes Guerrero-Kommritz & Heard, 2003
                                                                                
 09 Genus Hainanius Bamber, 1998
                                                                                
 10 Genus Langapseudes Bacescu, 1987 [monotypic]
                                                                                
 11 Genus Mendamanus Bamber, 1999 [monotypic]
                                                                                
 12 Genus Muramurina Gutu, 2007
                                                                                
 13 Genus Obscurapseudes Gutu, 2006 [monotypic]
                                                                                
 14 Genus Paradoxapseudes Gutu, 1991
                                                                                
 15 Genus Pectinapseudes Bacescu & Williams, 1988
                                                                                
 16 Genus Spinosapseudes Gutu, 1996
                                                                                
 17 Genus Taraxapseudes Santos & Hansknecht, 2007 [monotypic]
                                                                                
 18 Genus Tuberapseudes Bacescu & Gutu, 1971 [monotypic]
                                                                                
 19 Genus Typhlapseudes Beddard, 1886 [monotypic]
                                                                                
 20 Genus Xanthapseudes Gutu, 2008