Class Scorpionida Latreille, 1810 - scorpions Order Scorpiones Koch, 1837 - scorpions Suborder Neoscorpionina Thorell & Lindström, 1885 Infraorder Orthosterni Pocock, 1911 Superfamily Chactoidea Pocock, 1893 Family Euscorpiidae Laurie, 1896 Genus Plesiochactas Pocock, 1900