Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Annelida Lamarck, 1809 - segmented worms
     Class Polychaeta Grube, 1850 - polychaetes
       01 Order Phyllodocida Dales, 1962
       02 Order Eunicida Ushakov, 1955
       03 Order Spionida Rouse & Fauchald, 1997
       04 Order Chaetopterida see Order Spionida Rouse & Fauchald, 1997
       05 Order Cirratulida
       06 Order Opheliida see Order Scolecida Rouse & Fauchald, 1997
       07 Order Capitellida Fauchald, 1977 see Order Scolecida Rouse & Fauchald, 1997
       08 Order Terebellida Rouse & Fauchald, 1977
       09 Order Sabellida Fauchald, 1977
       10 Order Nerillida
       11 Order Dinophilida
       12 Order Polygordiida
       13 Order Protodrilida