Phylum Annelida Lamarck, 1809 - segmented worms Class Polychaeta Grube, 1850 - polychaetes Order Spionida Rouse & Fauchald, 1997 1 Family Spionidae Grube, 1850 2 Family Apistobranchidae Mesnil & Caullery, 1898 3 Family Poecilochaetidae Hannerz, 1956 4 Family Trochochaetidae Pettibone, 1963