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 Lumbricoidea Claus, 1876
                   1 Family Sparganophilidae
                   1 Family Spargonophilidae see Family Sparganophilidae
                   2 Family Ailoscolecidae M.B. Bouché, 1969
                   3 Family Hormogastridae
                   4 Family Lumbricidae Rafinesque-Schmaltz, 1815 - earthworms
                   5 Family Lutodrilidae McMahan, 1976