Metazoa Haeckel 1874 - multicellular animals see Kingdom Animalia Linnaeus, 1758 Phylum Nemertea Schultze, 1851 - ribbon worms Neonemertea Thollesson & Norenburg, 2003 Hoplonemertea Hubrecht, 1879 see Order Hoplonemertea Hubrecht, 1879 Monostilifera see Suborder Monostilifera Brinkmann, 1917 Distromatonemertea Thollesson & Norenburg, 2003 Genus Poseidonemertes Kirsteuer, 1967 Poseidonemertes collaris Roe & Wickham, 1984