Opisthokonta Cavalier-Smith 1987, nom. cl. inval. see Clade Opisthokonta Cavalier-Smith 1987 [Simpson & Medina 2020]
Count: 30p;8f;2g
   Metazoa Haeckel 1874 - multicellular animals see Kingdom Animalia Linnaeus, 1758
  Count: [p] 30p;8f;2g
     Epitheliozoa Ax, 1996
    Count: [p] 29p;8f;2g
       Eumetazoa Bütschli, 1910 - eumetazoans
      Count: [p] 28p;8f;2g
         Acrosomata Ax, 1996 see [unranked] Eumetazoa Bütschli, 1910
        Count: [p] 27p;8f;1g
           Bilateria Hatschek, 1888 - bilaterians see Subkingdom Bilateria Hatschek, 1888
          Count: [p] 26p;8f;1g
             Protostomia Grobben, 1908 see Infrakingdom Protostomia Grobben, 1908
            Count: [p] 23p;5f;1g
               Lophotrochozoa Halanych, Bacheller, Aguinaldo, Liva, Hillis & Lake 1995 - lophotrochozoans
              Count: [p] 13p;5f;1g
                 Spiralia Schleip, 1929 - spiralians see Superphylum Spiralia Schleip, 1929
                Count: [p] 11p;3f;1g
                   Platyzoa Ax, 1987 see [unranked] Spiralia Schleip, 1929
                  Count: [p] 4p
                     Platyhelminthes Gegenbaur, 1859 - flatworms
                    Count: -
                       1 Catenulida Graff, 1905 - catenulid flatworms see Order Catenulida Meixner, 1924
                      Count: -
                       2 Euplathelminthes see [unranked] Rhabditophora Ehlers, 1985
                      Count: -
                       3 "Mesozoa" van Beneden, 1876
                      Count: -