[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
         Class †Megacheira Hou & Bergström, 1997 [paraphyletic]
           Family †Jianfengiidae Aria, Zhao, Zeng, Guo & Zhu, 2020
             1 Genus †Jianfengia Hou, 1987
             2.1 Genus †Sklerolibyon Aria, Zhao, Zeng, Guo & Zhu, 2020 [monotypic]
             2.2.1 ?Genus †Parapeytoia Hou, Bergström & Ahlberg, 1995 [monotypic]
             2.2.2 Genus †Fortiforceps Hou & Bergström, 1997 [monotypic]