Phylum Annelida Lamarck, 1809 - segmented worms
   Class Polychaeta Grube, 1850 - polychaetes
     Order Phyllodocida Dales, 1962
       Superfamily Nereidoidea see Suborder Nereidiformia
         Family Syllidae Grube, 1850
           Subfamily Exogoninae Rioja, 1925
             Genus Sphaerosyllis Claparède, 1863
               Subgenus Prosphaerosyllis San Martin, 1984