Phylum Annelida Lamarck, 1809 - segmented worms Class Polychaeta Grube, 1850 - polychaetes Order Phyllodocida Dales, 1962 Superfamily Phyllodocoidea Ørsted, 1843 Family Lacydoniidae Bergström, 1914 Genus Lacydonia Marion, in Marion & Bobretzky, 1874