organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Kingdom Animalia Linnaeus, 1758 - animals
     Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
       Bilateria Hatschek, 1888 see Subkingdom Bilateria Hatschek, 1888
         Acoelomata see [unranked] Acoelomates Hyman, 1951
           Phylum Nemertina Oersted, 1844 see Phylum Nemertini
             ?Genus †Amiskwia Walcott, 1911
             Genus Amphiporus Ehrenberg, 1831
             Genus Cephalothrix Oersted, 1843
             Genus Cerebratulus Renier, 1804
             Genus Emplectonema Stimpson, 1857
             Genus Geonemertes Semper, 1863
             Genus Lineus Sowerby, 1805
             Genus Malacobdella Blainville, 1827
             Genus Nectonemertes Verrill, 1892
             Genus Paranemertes Coe, 1901
             Genus Prostoma Dugès, 1828
             Genus Tubulanus Renier, [1804]