[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Enterozoa
     Grade Cœlomata
       Phylum Appendiculata {Lankester}
         Branch Chætopoda
           Class Polychœta
             1 Order Vagantia
             2 Order Sedentaria (Lamarck, 1818)
             3 Order Haliscolecina