protostomes see [unranked] Protostomia Grobben, 1908
   1 Spiralia Schleip, 1929 - spiralians see Superphylum Spiralia Schleip, 1929
   2 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]