living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Eukaryotae see Domain Eukaryota Chatton, 1925
     Animalia Linnaeus, 1758 - animals
       Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Nemertea Schultze, 1851 - ribbon worms
           Anopla see Phylum Nemertea Schultze, 1851
             Palaeonemertea Hubrecht, 1879 see Phylum Nemertea Schultze, 1851
               Cephalothricidae McIntosh, 1874
                 Cephalothrix Oersted, 1843
                   1 Cephalothrix rufifrons (Johnston)
                   2 Cephalothrix linearis (J. Rathke, 1799)