Chelicerata Heymons, 1901 Scorpiones Koch, 1837 - scorpions †Holosternina Kjellesvig-Waering, 1986 Superfamily †Acanthoscorpionoidea Kjellesvig-Waering, 1986 Family †Acanthoscorpioniidae Dunlop, Penney & Jekel, 2010, orth. inval. [monotypic] see Family Acanthoscorpionidae Kjellesvig-Waering, 1986 1 Genus †Acanthoscorpio Kjellesvig-Waering, 1986