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 Exogone Ørsted, 1845 Subgenus Parexogone Mesnil & Caullery, 1918 see Genus Parexogone Mesnil & Caullery, 1918