[Panarthropoda] Nielsen, 1995 - panarthropods
   Arthropoda Siebold, 1848 - arthropods see Phylum Arthropoda Siebold, 1848
     Chelicerata Heymons, 1901 see Superclass Chelicerata Heymons, 1901
       1 Pycnogonida Latreille, 1810 - sea spiders see Epiclass Pycnogonida Latreille, 1810
       2 Euchelicerata Weygoldt & Paulus, 1979