Biota [unranked]
  Animalia [kingdom]
    Annelida [phylum]
      Chaetopteriformia [class]
        Apistobranchus Levinsen, 1883 [genus]
        Psammodrilus Swedmark, 1952 [genus]
        Chaetopteridae Audouin & Milne-Edwards, 1833 [family]
      Oweniida [class]
        Oweniidae Rioja, 1917 [family]
        Magelona Mueller, 1858 [genus]
      Annelida incertae sedis [unranked]