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 Nematoda Gegenbaur, 1859
             Subclass Secernentea
               Order Ascaridida see Order Spirurida Railliet, 1914
                 Genus Ascaridia Dujardin, 1845[1844]
                 Genus Ascaris Linnaeus, 1758
                 Genus Enterobius Baird, 1853
                 Genus Heterakis Dujardin, 1845[1844]
                 Genus Oxyuris Rudolphi, 1803
                 Genus Stomachus
                 Genus Toxocara Stiles, 1905