Metazoa Haeckel 1874 - multicellular animals see Kingdom Animalia Linnaeus, 1758
   Planulozoa Wallberg, Thollesson, Farris & Jondelius 2004
     Bilateria Hatschek, 1888 - bilaterians see Subkingdom Bilateria Hatschek, 1888
       Nephrozoa Jondelius, Ruiz-Trillo, Baguñà & Riutort 2002
         Protostomia Grobben, 1908 see Infrakingdom Protostomia Grobben, 1908
           Ecdysozoa Aguinaldo, Turbeville, Linford, Rivera, Garey, Raff & Lake 1997, nom. cl. inval. - ecdysozoans see Clade Ecdysozoa Aguinaldo, Turbeville, Linford, Rivera, Garey, Raff & Lake 1997 [Lake, Halanych, Servin & Garey 2020]