Chelicerata Heymons, 1901 Scorpiones Koch, 1837 - scorpions Orthosternina Pocock, 1911 see Infraorder Orthosterni Pocock, 1911 Superfamily Chactoidea Pocock, 1893 Family Scorpionidae Latreille, 1802 Genus †Sinoscorpius Hong, 1983