Class Oligochaeta Grube, 1850 - oligochaetes see [unranked] oligochaetous Clitellata
   Subclass Diplotesticulata
     Superorder Metagynophora Jamieson, 1988
       Order Opisthopora
         Suborder Crassiclitellata
           Cohort Terrimegadrili Jamieson, 1988
             1 Superfamily Ocnerodriloidea
             2 Superfamily Eudriloidea
             3.1 Superfamily Lumbricoidea Claus, 1876
             3.2 Superfamily Megascolecoidea