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
           1 Class Gastrotricha see Phylum Gastrotricha Metschnikoff, 1864
           2 Class Rotatoria Ehrenberg, 1838 see Phylum Rotifera Cuvier, 1798
           3 Class Nematoda Gegenbaur, 1859
           4 Class Nematomorpha Vejdovsky, 1886 see Phylum Nematomorpha Vejdovsky, 1886
           5 Class Kinorhyncha Reinhard, 1887 see Phylum Kinorhyncha Reinhard, 1887
           6 Class Acanthocephala Rudolphi, 1802