[Arthropoda] Siebold, 1848 - arthropods see Phylum Arthropoda Siebold, 1848
   †Artiopoda Hou & Bergström, 1997 see Subphylum Artiopoda Hou & Bergström, 1997
     †Trilobita Walch, 1771 - trilobites see Class Trilobita Walch, 1771
       Genus †Triarthrus Green, 1832