[Panarthropoda] Nielsen, 1995 - panarthropods
   Arthropoda Siebold, 1848 - arthropods see Phylum Arthropoda Siebold, 1848
     Chelicerata Heymons, 1901 see Superclass Chelicerata Heymons, 1901
       Pycnogonida Latreille, 1810 - sea spiders see Epiclass Pycnogonida Latreille, 1810
         Ammotheidae Dohrn, 1881
           1 Genus Ammothea Leach, 1814
           2.1 Genus Achelia Hodge, 1864
           2.2 Genus Tanystylum Miers, 1879