Annelida Lamarck, 1809 - segmented worms
   "polychaetes" see Class Polychaeta Grube, 1850
     Palpata G.W. Rouse & K. Fauchald, 1997
       Aciculata G.W. Rouse & K. Fauchald, 1997
         Phyllodocida see Order Phyllodocida Dales, 1962
           Nereidiformia see Suborder Nereidiformia
             Family Chrysopetalidae E. Ehlers, 1864
               Strepternos didymopyton Watson Russell, 1991