Eumetazoa Bütschli, 1910 - eumetazoans
   [unranked] Bilateria Hatschek, 1888 see Subkingdom Bilateria Hatschek, 1888
     Protostomia Grobben, 1908 see Infrakingdom Protostomia Grobben, 1908
       Grade Pseudocoelomates Hyman, 1951
         01 Phylum Rotifera Cuvier, 1798 - rotifers see Phylum Syndermata Ahlrichs, 1995
         02 Phylum Gastrotricha Metschnikoff, 1864 - gastrotrichs
         03 Phylum Kinorhyncha Reinhard, 1887 - kinorhynchs
         04 Phylum Gnathostomulida Ax, 1956 - gnathostomulids
         05 Phylum Nematoda Gegenbaur, 1859 - round worms
         06 Phylum Priapulida Delage & Hérouard, 1897 - priapulids
         07 Phylum Nematomorpha Vejdovsky, 1886 - horsehair worms
         08 Phylum Acanthocephala Kohlreuther, 1771 - acanthocephalans see [unranked] Acanthocephala Kohlreuther, 1771
         09 Phylum Entoprocta Nitsche, 1869 - entoprocts
         10 Phylum Loricifera Kristensen, 1983 - loriciferans