Metazoa see Kingdom Animalia Linnaeus, 1758
   Gastraeozoa
     Trochaeozoa see [unranked] Bilateria Hatschek, 1888
       Gastroneuralia Ulrich, 1951
         Spiralia Schleip, 1929 - spiralians see Superphylum Spiralia Schleip, 1929
           Parenchymia
             1 Phylum Nemertini see Phylum Nemertea Schultze, 1851
             2 Phylum Platyhelminthes Gegenbaur, 1859 - flatworms