Class Oligochaeta Grube, 1850 - oligochaetes see [unranked] oligochaetous Clitellata Subclass Diplotesticulata Superorder Metagynophora Jamieson, 1988 Order Opisthopora Suborder Crassiclitellata Cohort Terrimegadrili Jamieson, 1988 Superfamily Ocnerodriloidea 1 Family Ocnerodrilidae Beddard, 1891