Annelida Lamarck, 1809 - segmented worms Class Oligochaeta Grube, 1850 - oligochaetes see [unranked] oligochaetous Clitellata Order Tubificida Family Naididae Ehrenberg, 1828 - naidids Genus Dero Oken, 1807 Dero niveum Aiyer, 1929 see Dero nivea Aiyer, 1930