Phylum Annelida Lamarck, 1809 - segmented worms Class Polychaeta Grube, 1850 - polychaetes Order Sabellida Fauchald, 1977 Family Spirorbidae (Chamberlin, 1919) Pillai, 1970 Subfamily Spirorbinae Chamberlin, 1919 1 Genus Spirorbis Daudin, 1800