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 Acanthocephala Kohlreuther, 1771 - acanthocephalans see [unranked] Acanthocephala Kohlreuther, 1771
           Class Palaeacanthocephala (Meyer, 1931)
             Order Echinorhynchida Southwell & Macfie, 1925
               Family Rhadinorhynchidae Travassos, 1923
                 Subfamily Gorgorhynchinae Van Cleave & Lincicome, 1940
                   1 Genus Sclerocollum Schmidt & Paperna, 1978
                   2 Genus Gorgorhynchus Chandler, 1934
                   3 Genus Gorgorhynchoides Cable & Linderoth, 1963
                   4 Genus Micracanthorhynchina Strand, 1936
                   5 Genus Australorhynchus Lebedev, 1967
                   6 Genus Cleaveius Subramanian, 1927
                   7 Genus Pseudauchen Yamaguti, 1963
                   8 Genus Leptorhynchoides Kostileff, 1924
                   9 Genus Metacanthocephalus Yamaguti, 1959