Phylum Annelida Lamarck, 1809 - segmented worms Class Polychaeta Grube, 1850 - polychaetes Order Sabellida Fauchald, 1977 Family Serpulidae Savigny, 1818 Subfamily Serpulinae (Savigny, 1818) Rioja, 1923 Genus Ditrupa Berkeley, 1832-1834[1835]