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