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
               Family Ailoscolecidae M.B. Bouché, 1969