[Arthropoda] Siebold, 1848 - arthropods see Phylum Arthropoda Siebold, 1848
   Arachnomorpha Heider, 1913
     †Trilobitomorpha Størmer, 1944 see Superclass Trilobitomorpha Størmer, 1944
       [†"Naroiidae" nom. null.] see Family Naraoiidae Walcott, 1912