[Phylum] [Arthropoda] Siebold, 1848 - arthropods
Count: [g†g] 2c;14o;803f;367g; ‡1f; †6o;166f;962g
   Chelicerata Heymons, 1901
  Count: [g†g] 1c;13o;792f;366g; ‡1f; †6o;164f;951g [7 Feb 2025]
     Euchelicerata Weygoldt & Paulus, 1979
    Count: [g†g] 1c;13o;792f;366g; ‡1f; †6o;164f;948g [7 Feb 2025]
       Xiphosura Latreille, 1802 - horseshoe crabs see Class Xiphosura Latreille, 1802
      Count: [*†g] 1c;1o;1f;2g; †7f;62g
         Prosomapoda Lamsdell, 2013
        Count: [*†g] 1c;1o;1f;2g; †7f;62g
           [Class] Xiphosura Latreille, 1802 [monotypic] - horseshoe crabs
          Count: [*†g] 1o;1f;2g; †5f;49g [30 Jul 2024]
             ?Genus †Willwerathia Størmer, 1969
            Count: -