Kingdom Animalia Linnaeus, 1758 - animals Phylum Annelida Lamarck, 1809 - segmented worms Class Myzostomida Genus Asteriomyzostomum Genus Cystimyzostomum Genus Myzostoma Leuckart, 1829 see Genus Myzostomum Leuckart, 1827 Genus Myzostomum Leuckart, 1827