Phylum Annelida Lamarck, 1809 - segmented worms
   Class Polychaeta Grube, 1850 - polychaetes
     01 Order Amphinomida Lamarck, 1818
     02 Order Spintherida
     03 Order Phyllodocida Dales, 1962
     04 Order Eunicida Ushakov, 1955
     05 Order Dinophilida
     06 Order Orbiniida see Order Scolecida Rouse & Fauchald, 1997
     07 Order Spionida Rouse & Fauchald, 1997
     08 Order Chaetopterida see Order Spionida Rouse & Fauchald, 1997
     09 Order Magelonida see Order Spionida Rouse & Fauchald, 1997
     10 Order Protodrilida
     11 Order Cirratulida
     12 Order Cossurida see Order Scolecida Rouse & Fauchald, 1997
     13 Order Ctenodrilida see Order Terebellida Rouse & Fauchald, 1977
     14 Order Psammodrilida
     15 Order Flabelligerida see Order Terebellida Rouse & Fauchald, 1977
     16 Order Opheliida see Order Scolecida Rouse & Fauchald, 1997
     17 Order Capitellida Fauchald, 1977 see Order Scolecida Rouse & Fauchald, 1997
     18 Order Oweniida see Order Sabellida Fauchald, 1977
     19 Order Sternaspida see Order Terebellida Rouse & Fauchald, 1977
     20 Order Terebellida Rouse & Fauchald, 1977
     21 Order Sabellariida see Order Sabellida Fauchald, 1977
     22 Order Sabellida Fauchald, 1977
     23 ?Family Nerillidae Levinsen, 1883
     24 ?Family Polygordiidae Czerniavsky, 1881
     25 ?Family Diurodrilidae Kristensen & Niilonen, 1982