Phylum Annelida Lamarck, 1809 - segmented worms
   Class Polychaeta Grube, 1850 - polychaetes
     Order Spionida Rouse & Fauchald, 1997
       Family Spionidae Grube, 1850
         01 Genus Aonides Claparède, 1864
         02 Genus Laonice Malmgren, 1867
         03 Genus Malacoceros de Quatrefages, 1843
         04 Genus Marenzelleria Mesnil, 1896
         05 Genus Microspio Mesnil, 1896
         06 Genus Polydora Bosc, 1802
         07 Genus Prionospio Malmgren, 1867
         08 Genus Pygospio Claparède, 1863
         09 Genus Scolelepis Blainville, 1828
         10 Genus Spio Fabricius, 1785
         11 Genus Spiophanes Grube, 1860
         12 Genus Streblospio Webster, 1879