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 Annelida Lamarck, 1809 - segmented worms
           Class Polychaeta Grube, 1850 - polychaetes
             Order Chaetopterida see Order Spionida Rouse & Fauchald, 1997
               Family Chaetopteridae Malmgren, 1867
                 1 Genus Chaetopterus Cuvier, 1830
                 2 Genus Mesochaetopterus Potts, 1914
                 3 Genus Phyllochaetopterus Grube, 1863
                 4 Genus Spiochaetopterus M. Sars, 1853
                 5 Genus Sasekumaria Rullier, 1976