Order Scorpiones Koch, 1837 - scorpions
   Suborder Neoscorpionina Thorell & Lindström, 1885
     Infraorder Orthosterni Pocock, 1911
       Parvorder Iurida Soleglad & Fet, 2003
         Superfamily Vaejovoidea Thorell, 1876
           Subfamily Syntropinae Kraepelin, 1905
             01 Genus Balsateres González-Santillán & Prendini, 2013
             02 Genus Chihuahuanus González-Santillán & Prendini, 2013
             03 Genus Kochius Soleglad & Fet, 2008
             04 Genus Kuarapu Francke & Ponce-Saavedra, 2010
             05 Genus Maaykuyak González-Santillán & Prendini, 2013
             06 Genus Mesomexovis González-Santillán & Prendini, 2013
             07 Genus Paravaejovis Williams, 1980
             08 Genus Syntropis Kraepelin, 1900
             09 Genus Thorellius Soleglad & Fet, 2008
             10 Genus Vizcaino González-Santillán & Prendini, 2013