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 1 Polystilifera see Suborder Polystilifera Brinkmann, 1917 2 Monostilifera see Suborder Monostilifera Brinkmann, 1917