Order Scorpiones Koch, 1837 - scorpions Family Hormuridae Laurie, 1896 Genus Opisthacanthus Peters, 1861 1 Subgenus Opisthacanthus (Opisthacanthus) Peters, 1861 2 Subgenus Opisthacanthus (Monodopisthacanthus) Lourenço, 2001 3 Subgenus Opisthacanthus (Nepabellus) Francke, 1974