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 Eunicida Ushakov, 1955
               Superfamily Eunicacea see Superfamily Eunicoidea
                 Family Arabellidae Hartman, 1944 see Family Oenonidae Kinberg, 1865
                   1 Genus Arabella Grube, 1850
                   2 Genus Cenothrix Chamberlin, 1919
                   3 Genus Drilonereis Claparède, 1870
                   4 Genus Notocirrus Schmarda, 1861
                   5 Genus Oligognathus Spengel, 1881
                   6 Genus Labrorostratus Saint-Joseph, 1888
                   7 Genus Haematocleptes Wirén, 1886