Chelicerata Heymons, 1901 Scorpiones Koch, 1837 - scorpions †Holosternina Kjellesvig-Waering, 1986 Superfamily †Eoctonoidea Kjellesvig-Waering, 1986 Family †Buthiscorpiidae Kjellesvig-Waering, 1986 [monotypic] 1 Genus †Buthiscorpius Petrunkevitch, 1953