Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Class Nemertini see Phylum Nemertea Schultze, 1851
           Subclass Enopla see Class Enopla Schultze, 1851
             Order Hoplonemertini see Order Hoplonemertea Hubrecht, 1879
               Genus Prostoma Dugès, 1828
                 Prostoma graecense (Böhmig, 1892)