Opisthacanthus is a genus of scorpions in the family Hormuridae occurring in Central and South America, the Caribbean, Africa and Madagascar. The species in this genus are: - Opisthacanthus africanus (Simon, 1876) - Opisthacanthus asper (Peters, 1861) - Opisthacanthus basutus (Lawrence, 1955) - Opisthacanthus brevicauda Rojas-Runjaic, Borges & Armas, 2008 - Opisthacanthus capensis (Thorell, 1876) - Opisthacanthus cayaporum (Vellard, 1932) - Opisthacanthus daraisensis (Lourenço, 2006) - Opisthacanthus diremptus (Karsch, 1879) - Opisthacanthus elatus (Gervais, 1843) - Opisthacanthus laevipes (Pocock, 1893) - Opisthacanthus lamorali Lourenço, 1981 - Opisthacanthus lecomtei (Lucas, 1858) - Opisthacanthus lepturus (Beauvois, 1805) - Opisthacanthus lucienneae (Lourenço, 2006) - Opisthacanthus maculatus (Lourenço, 2006) - Opisthacanthus madagascariensis (Kraepelin, 1894) - Opisthacanthus piceus (Lourenço, 2006) - Opisthacanthus piscatorius (Lawrence, 1955) - Opisthacanthus punctulatus (Pocock, 1896) - Opisthacanthus rugiceps (Pocock, 1897) - Opisthacanthus rugulosus (Pocock, 1896) - Opisthacanthus valerioi (Lourenço, 1980) - Opisthacanthus validus (Thorell, 1876) - Opisthacanthus weyrauchi (Mello-Leitão, 1948)

Subgenus Opisthacanthus Peters, 1861 I. cayaporum group II. lepturus group III. lecomtei group Subgenus Nepabellus Francke, 1974 I. africanus group II. asper group III. laevipes group IV. rugulosus group V. validus group Subgenus Monodopisthacanthus Lourenço, 2001 I. madagascariensis group - Opisthacanthus cayaporum Vellard, 1932 - Opisthacanthus heurtaultae Lourenço, 1980 - Opisthacanthus weyrauchi Mello-Leitão, 1948 - Opisthacanthus lepturus (Beauvois, 1805) - Opisthacanthus elatus (Gervais, 1844) - Opisthacanthus valerioi Lourenço, 1980 - Opisthacanthus borboremai sp. n. - Opisthacanthus lecomtei (Lucas, 1858) - Opisthacanthus africanus africanus Simon, 1876 - Opisthacanthus africanus pallidus Lourenço, 2003 - Opisthacanthus capensis Thorell, 1876 - Opisthacanthus diremptus (Karsch, 1879) - Opisthacanthus asper (Peters, 1861) - Opisthacanthus basutus Lawrence, 1955 - Opisthacanthus rugiceps Pocock, 1897 - Opisthacanthus laevipes (Pocock, 1893) - Opisthacanthus lamorali Lourenço, 1981 - Opisthacanthus rugulosus Pocock, 1896 - Opisthacanthus piscatorius Lawrence, 1955 - Opisthacanthus validus Thorell, 1876 - Opisthacanthus madagascariensis Kraepelin, 1894 - Opisthacanthus punctulatus Pocock, 1896