Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Nemertea Schultze, 1851 - ribbon worms
     Class Anopla see Phylum Nemertea Schultze, 1851
       Order Palaeonemertea Hubrecht, 1879 see Phylum Nemertea Schultze, 1851
         Genus Carinoma Oudemans, 1885
         Genus Cephalothrix Oersted, 1843
         Genus Tubulanus Renier, [1804]