living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Nemertea Schultze, 1851 - ribbon worms
           Class Enopla Schultze, 1851
             Order Hoplonemertea Hubrecht, 1879
               Suborder Monostilifera Brinkmann, 1917
                 Family Prosorhochmidae Bürger, 1895
                   Genus Prosorhochmusᵀ Keferstein, 1862
                     1 Prosorhochmus claparedii Keferstein
                     2 Prosorhochmus albidus (Coe, 1905)
                     3 ?Prosorhochmus delagei Oxner, 1907
                     4 ?Prosorhochmus korotneffi Bürger, 1895
                     5 ?Prosorhochmus viviparus (Ulyanin, 1870)
                     6 ?Prosorhochmus subterraneus Friedrich, 1949