[living organisms]
 see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
  
 Superkingdom Eukaryota Whittaker & Margulis, 1978
 see Domain Eukaryota Chatton, 1925
    
 Kingdom Animalia Linnaeus, 1758 - animals
      
 Subkingdom Bilateria Hatschek, 1888 - bilaterians
        
 Infrakingdom Protostomia Grobben, 1908
          
 Superphylum Spiralia Schleip, 1929
            
 01 Phylum Acanthocephala Kohlreuther, 1771 - acanthocephalans
 see [unranked] Acanthocephala Kohlreuther, 1771
            
 02 Phylum Annelida Lamarck, 1809 - segmented worms
            
 03 Phylum Brachiopoda Duméril, 1806 - brachiopods
            
 04 Phylum Bryozoa Ehrenberg, 1831 - bryozoans
            
 05 Phylum Cycliophora Funch & Kristensen, 1995 [monotypic] - cycliophorans
            
 06 Phylum Entoprocta Nitsche, 1869 - entoprocts
            
 07 Phylum Gastrotricha Metschnikoff, 1864 - gastrotrichs
            
 08 Phylum Gnathostomulida Ax, 1956 - gnathostomulids
            
 09 Phylum Micrognathozoa Kristensen & Funch, 2000 [monotypic]
            
 10 Phylum Mollusca Linnaeus, 1758 - molluscs
            
 11 Phylum Nemertea Schultze, 1851 - ribbon worms
            
 12 Phylum Phoronida Hatschek, 1888 - phoronids
            
 13 Phylum Platyhelminthes Gegenbaur, 1859 - flatworms
            
 14 Phylum Rotifera Cuvier, 1798 - rotifers
 see Phylum Syndermata Ahlrichs, 1995
            
 15 Phylum Sipuncula Rafinesque, 1814 - peanut worms
 see Class Sipuncula