Kingdom Animalia Linnaeus, 1758 - animals Phylum Annelida Lamarck, 1809 - segmented worms Class Polychaeta Grube, 1850 - polychaetes Order Chaetopterida see Order Spionida Rouse & Fauchald, 1997 Family Chaetopteridae Malmgren, 1867 Genus Mesochaetopterus Potts, 1914