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 Echinorhynchidae Cobbold, 1876
                 Subfamily Echinorhynchinae Cobbold, 1876
                   1 Genus Echinorhynchus Zoega in Müller, 1776
                   2 Genus Acanthocephalus Koelreuter, 1771
                   3 Genus Paracanthocephalus Achmerov & Achmerova, 1941
                   4 Genus Acanthocephaloides Meyer, 1931
                   5 Genus Pseudoacanthocephalus Petrochenko, 1956