Annelida Lamarck, 1809 - segmented worms Class Oligochaeta Grube, 1850 - oligochaetes see [unranked] oligochaetous Clitellata Order Opisthopora Family Octochaetidae Michaelsen, 1900 Genus [Eudichogaster] Michaelsen, 1902 1 Eudichogaster chittagongensis Stephenson, 1917