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]
   Phylum †Lobopodia Snodgrass, 1938 - lobopodians
     Class †Xenusia Dzik & Krumbiegel, 1989 - xenusians
       [Order] †Xenusiida Dzik & Krumbiegel, 1989
         Genus †Xenusion Pompeckj, 1927
           1 †Xenusion auerswaldae Pompeckj, 1927