[Arthropoda] Siebold, 1848 - arthropods see Phylum Arthropoda Siebold, 1848
   †Artiopoda Hou & Bergström, 1997 see Subphylum Artiopoda Hou & Bergström, 1997
     †Agnostina Salter, 1864
       Genus †Agnostus Brongniart, 1822