Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Arthropoda Siebold, 1848 - arthropods
     Subphylum Cheliceriformes
       Class Chelicerata Heymons, 1901
         Subclass Arachnida Lamarck see Class Arachnida Lamarck, 1801
           Order Scorpiones Koch, 1837 - scorpions
             Genus Androctonus Ehrenberg, 1828
             Genus Bothriurus Peters, 1861
             Genus Buthus Leach, 1815
             Genus Centruroides Marx, 1890
             Genus Chactus
             Genus Chaerilus Simon, 1877
             Genus Diplocentrus Peters, 1861
             Genus Hadrurus Thorell, 1876
             Genus Hemiscorpion Peters, 1861
             Genus Nebo Simon, 1878
             Genus Parabuthus Pocock, 1890
             Genus Paruroctonus Werner, 1934
             Genus Tityus Koch, 1836
             Genus Vaejovis Koch, 1836