Class Oligochaeta Grube, 1850 - oligochaetes see [unranked] oligochaetous Clitellata Subclass Diplotesticulata Superorder Metagynophora Jamieson, 1988 Order Opisthopora Suborder Crassiclitellata Cohort Aquamegadrili Jamieson, 1988 Superfamily Almoidea Family Almidae Duboscq, 1902 1 Genus Criodrilus Hoffmeister, 1845