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 Platyhelminthes Gegenbaur, 1859 - flatworms
           Class Cestoda - tapeworms see Infraclass Cestoda
             Subclass Eucestoda - eucestodes see [unranked] Eucestoda
               Order Proteocephalidea Mola, 1928 see Order Onchoproteocephalidea Caira, Jensen, Waeschenbach, Olson & Littlewood, 2014
                 Family Proteocephalidae La Rue, 1911
                   1 Subfamily Prosobothriinae Baer & Euzet, 1955 see Family Prosobothriidae Baer & Euzet, 1955
                   2 Subfamily Proteocephalinae La Rue, 1911
                   3 Subfamily Marsipocephalinae Yamaguti, 1959, nom. illeg. see Subfamily Marsypocephalinae Woodland, 1933
                   4 Subfamily Zygobothriinae Woodland, 1933
                   5 Subfamily Endorchiinae Woodland, 1934
                   6 Subfamily Monticelliinae Mola, 1929
                   7 Subfamily Ephedrocephalinae Mola, 1929
                   8 Subfamily Peltidocotylinae Woodland, 1934
                   9 Subfamily Rudolphiellinae Woodland, 1935