[Phylum] [Arthropoda] Siebold, 1848 - arthropods
   Chelicerata Heymons, 1901
     Euchelicerata Weygoldt & Paulus, 1979
       [Order] Scorpiones Koch, 1837 - scorpions
         Suborder Neoscorpionina Thorell & Lindström, 1885
           Infraorder Orthosterni Pocock, 1911
             Parvorder Buthida Soleglad & Fet, 2003
               1 Family †Chaerilobuthidae Lourenço & Beigel, 2011 [monotypic]
               2 Family †Palaeotrilineatidae Lourenço, 2012 [monotypic]
               3 Superfamily Psuedochactoidea Dunlop, Penney & Jekel, 2023, orth. inval. [monotypic] see Superfamily Pseudochactoidea Gromov, 1998
               4 Superfamily Chaeriloidea Pocock, 1893 [monotypic]
               5 Superfamily Buthoidea Koch, 1837