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
         Phylum Asc-helminthes
           Class Acanthocephala Rudolphi, 1802
             Order Palaeoacanthocephala
               Genus Acanthocephalus Koelreuter, 1771
               Genus Filicollis Lühe, 1911
               Genus Polymorphus Lühe, 1911
               1 Family Echinorhynchidae Cobbold, 1876
               2 Family Pomphorhynchidae Yamaguti, 1939