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 Oligochaeta Grube, 1850 - oligochaetes see [unranked] oligochaetous Clitellata
             Order Haplotaxida
               Suborder Lumbricina see Suborder Crassiclitellata
                 Superfamily Megascolecoidea
                   Family Megascolecidae Rosa, 1891
                     1 Subfamily Megascolecinae Rosa, 1891 see Family Megascolecidae Rosa, 1891
                     2 Subfamily Acanthodrilinae Claus, 1880 see Family Acanthodrilidae Claus, 1880
                     3 Subfamily Octochaetinae Michaelsen, 1900 see Family Octochaetidae Michaelsen, 1900