living organisms
 see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
  
 Superkingdom Eukaryotae
 see Domain Eukaryota Chatton, 1925
    
 Kingdom Animalia Linnaeus, 1758 - animals
      
 Subkingdom Eumetazoa Butschli, 1910
 see [unranked] Eumetazoa Bütschli, 1910
        
 Phylum Arthropoda Siebold, 1848 - arthropods
          
 Subphylum Crustacea Brünnich, 1772 - crustaceans
 see Superclass Crustacea Pennant, 1777
            
 Subclass Malacostraca Latreille, 1802
 see Class Malacostraca Latreille, 1802
              
 Superorder Peracarida Calman, 1904
                
 1 Order Thermosbaenacea Monod, 1927 - thermosbaenaceans
                
 2 Order Spelaeogriphacea Gordon, 1957 - spelaeogriphaceans
                
 3 Order Mysidacea Haworth, 1825
 see Order Mysida Haworth, 1825
                
 4 Order Cumacea Krøyer, 1846 - cumaceans
                
 5 Order Tanaidacea Dana, 1849 - tanaids
                
 6 Order Isopoda Latreille, 1817 - isopods
                
 7 Order Amphipoda Latreille, 1816 - amphipods