[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]
   Superphylum Panarthropoda Nielsen, 1995 see [unranked] Panarthropoda Nielsen, 1995
     Arthropoda Siebold, 1848 - arthropods see Phylum Arthropoda Siebold, 1848
       Phylum Euarthropoda Lankester, 1904 see [unranked] Euarthropoda
         Pycnogonida Latreille, 1810 - pycnogonids