living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Eukaryotae see Domain Eukaryota Chatton, 1925
     Animalia Linnaeus, 1758 - animals
       Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Annelida Lamarck, 1809 - segmented worms
           Oligochaeta Grube, 1850 - oligochaetes see [unranked] oligochaetous Clitellata
             Haplotaxida
               Lumbricina see Suborder Crassiclitellata
                 Lumbricoidea Claus, 1876
                   Hormogastridae
                     Hormogastrinae
                       1 Hormogaster Rosa, 1887
                       2 Hemigastrodrilus Bouché, 1970