Chelicerata Heymons, 1901 Scorpiones Koch, 1837 - scorpions †Holosternina Kjellesvig-Waering, 1986 Superfamily †Eoctonoidea Kjellesvig-Waering, 1986 Family †Eoctonidae Kjellesvig-Waering, 1986 [monotypic] Genus †Eoctonus Petrunkevitch, 1913