Articulata Cuvier see [unranked] Protostomia Grobben, 1908
   Annelida Lamarck, 1809 - segmented worms see Phylum Annelida Lamarck, 1809
     Polychaeta see Class Polychaeta Grube, 1850
       Palpata G.W. Rouse & K. Fauchald, 1997
         Canalipalpata G.W. Rouse & K. Fauchald, 1997
           Spionida see Order Spionida Rouse & Fauchald, 1997
             1.1.1 Family Apistobranchidae Mesnil & Caullery, 1898
             1.1.2.1 Family Spionidae Grube, 1850
             1.1.2.2 Family Trochochaetidae Pettibone, 1963
             1.2.1.1 Family Longosomatidae Hartman, 1944
             1.2.1.2 Family Magelonidae Cunningham & Ramage, 1888
             1.2.2 Family Poecilochaetidae Hannerz, 1956
             2 Family Chaetopteridae Malmgren, 1867
             3 Family Uncispionidae Green, 1982