Phylum Annelida Lamarck, 1809 - segmented worms
   Class Polychaeta Grube, 1850 - polychaetes
     Order Capitellida Fauchald, 1977 see Order Scolecida Rouse & Fauchald, 1997
       Family Capitellidae Grube, 1862
         1 Genus Baldia Garwood & Bamber, 1988
         2 Genus Capitella de Blainville, 1828
         3 Genus Dasybranchus Grube, 1850
         4 Genus Heteromastus McIntosh, 1885
         5 Genus Mediomastus Hartman, 1944
         6 Genus Notomastus Sars, 1851