Class Oligochaeta Grube, 1850 - oligochaetes see [unranked] oligochaetous Clitellata
   Subclass Diplotesticulata
     Superorder Metagynophora Jamieson, 1988
       Order Opisthopora
         Suborder Alluroidina
           Superfamily Alluroidoidea
             1 Family Alluroididae
             2 Family Syngenodrilidae