Order Scorpiones Koch, 1837 - scorpions
   Suborder Neoscorpionina Thorell & Lindström, 1885
     Infraorder Orthosterni Pocock, 1911
       1 Parvorder Pseudochactida Soleglad & Fet, 2003 [monotypic] see Parvorder Buthida Soleglad & Fet, 2003
       2 Parvorder Buthida Soleglad & Fet, 2003 [monotypic]
       3 Parvorder Chaerilida Soleglad & Fet, 2003 [monotypic] see Parvorder Buthida Soleglad & Fet, 2003
       4 Parvorder Iurida Soleglad & Fet, 2003