Chelicerata Heymons, 1901 Scorpiones Koch, 1837 - scorpions †Holosternina Kjellesvig-Waering, 1986 Superfamily †Acanthoscorpionoidea Kjellesvig-Waering, 1986 Family †Stenoscorpioniidae Dunlop, Penney & Jekel, 2010, orth. inval. [monotypic] see Family Stenoscorpionidae Kjellesvig-Waering, 1986 Genus †Stenoscorpio Kjellesvig-Waering, 1986