organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Kingdom Animalia Linnaeus, 1758 - animals
     Eumetazoa Bütschli, 1910 - eumetazoans
       Bilateria Hatschek, 1888 - bilaterians see Subkingdom Bilateria Hatschek, 1888
         Protostomia Grobben, 1908 see Infrakingdom Protostomia Grobben, 1908
           Spiralia Schleip, 1929 - spiralians see Superphylum Spiralia Schleip, 1929
             Parenchymia
               Phylum Nemertini see Phylum Nemertea Schultze, 1851
                 Genus Amphiporus Ehrenberg, 1831
                 Genus Arhynchonemertes (N.W. Riser, 1988)
                 Genus Cerebratulus Renier, 1804
                 Genus Drepanophorus Hubrecht, 1874
                 Genus Emplectonema Stimpson, 1857
                 Genus Geonemertes Semper, 1863
                 Genus Lineus Sowerby, 1805
                 Genus Malacobdella Blainville, 1827
                 Genus Micrura Ehrenberg, 1831
                 Genus Oerstedia Quatrefages, 1846
                 Genus Pilidium Müller, 1846
                 Genus Prosorhochmus Keferstein, 1862
                 Genus Prostoma Dugès, 1828
                 Genus Tetrastemma Ehrenberg, 1831
                 Genus Tubulanus Renier, [1804]
                 1 Class Anopla see Phylum Nemertea Schultze, 1851
                 2 Class Enopla Schultze, 1851