Annelida Lamarck, 1809 - segmented worms
   "polychaetes" see Class Polychaeta Grube, 1850
     Scolecida G.W. Rouse & K. Fauchald, 1997 see Order Scolecida Rouse & Fauchald, 1997
       1.1.1.1.1.1 Family Arenicolidae Johnston, 1835
       1.1.1.1.1.2 Family Maldanidae Malmgren, 1867 - bamboo worms
       1.1.1.1.2 Family Capitellidae Grube, 1862
       1.1.1.2 Family Opheliidae Malmgren, 1867
       1.1.2 Family Scalibregmatidae Malmgren, 1867
       1.2.1.1 Family Orbiniidae Hartman, 1942
       1.2.1.2.1 Genus †Helminthoidea Schafhäutl, 1851
       1.2.1.2.2 Family Paraonidae Cerruti, 1909
       1.2.2 Genus Questa O. Hartman, 1966
       2 Family Cossuridae Day, 1963