Class Oligochaeta Grube, 1850 - oligochaetes see [unranked] oligochaetous Clitellata
   Subclass Diplotesticulata
     Superorder Metagynophora Jamieson, 1988
       Order Opisthopora
         Suborder Crassiclitellata
           Cohort Terrimegadrili Jamieson, 1988
             Superfamily Lumbricoidea Claus, 1876
               1 ?Family Kynotidae Jamieson, 1971
               2 Family Komarekionidae
               3 Family Ailoscolecidae M.B. Bouché, 1969
               4 Family Microchaetidae
               5 Family Hormogastridae
               6 Family Glossoscolecidae Michaelsen, 1900
               7 Family Lumbricidae Rafinesque-Schmaltz, 1815 - earthworms