Chelicerata Heymons, 1901 Scorpiones Koch, 1837 - scorpions Orthosternina Pocock, 1911 see Infraorder Orthosterni Pocock, 1911 Superfamily Chactoidea Pocock, 1893 Family Scorpionidae Latreille, 1802 1 Genus †Mioscorpio Kjellesvig-Waering, 1986 2 Genus †Sinoscorpius Hong, 1983