Annelida Lamarck, 1809 - segmented worms
   Class Oligochaeta Grube, 1850 - oligochaetes see [unranked] oligochaetous Clitellata
     Order Tubificida
       Family Naididae Ehrenberg, 1828 - naidids
         Genus Chaetogaster Baer, 1827
           1 Chaetogaster cristallinus Vejdovský, 1883
           2 Chaetogaster diastrophus (Gruithuisen, 1828)
           3 Chaetogaster langi Bretscher, 1896
           4 Chaetogaster limnaei von Baer, 1827