Annelida Lamarck, 1809 - segmented worms Class Oligochaeta Grube, 1850 - oligochaetes see [unranked] oligochaetous Clitellata Order Tubificida Family Naididae Ehrenberg, 1828 - naidids Genus [Nais] Müller, 1773 1 Nais communis Piguet, 1906 2 Nais simplex Piguet, 1906