Opisthacanthus

Opisthacanthus is a genus of scorpions in the family Hormuridae occurring in Central and South America, the Caribbean, Africa and Madagascar.

Species
The following species are recognised in the genus Opisthacanthus:
 * Opisthacanthus africanus Simon, 1876
 * Opisthacanthus ambanja Lourenço, 2014
 * Opisthacanthus andohahela Lourenço, 2014
 * Opisthacanthus antsiranana Lourenço, 2014
 * Opisthacanthus asper (Peters, 1861)
 * Opisthacanthus autanensis Gonzalez-Sponga, 2004
 * Opisthacanthus basutus Lawrence, 1955)
 * Opisthacanthus borboremai Lourenço & Fe, 2003
 * 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 faillei Lourenço & Wilme, 2019
 * Opisthacanthus heurtaultae Lourenço, 1980
 * Opisthacanthus laevipes (Pocock, 1893)
 * Opisthacanthus lamorali Lourenço, 1981
 * Opisthacanthus lavasoa Lourenço, Wilme & Waeber, 2016
 * Opisthacanthus lecomtei (Lucas, 1858)
 * Opisthacanthus lepturus (Beauvois, 1805)
 * Opisthacanthus lourencoi Ythier, 2022
 * Opisthacanthus lucienneae Lourenço, 2006
 * Opisthacanthus maculatus Lourenço, 2006
 * Opisthacanthus madagascariensis Kraepelin, 1894
 * Opisthacanthus milloti Lourenço & Goodman, 2008
 * Opisthacanthus pauliani Lourenço & Goodman, 2008
 * Opisthacanthus piceus Lourenço, 2006
 * Opisthacanthus piscatorius Lawrence, 1955
 * Opisthacanthus rugiceps Pocock, 1897
 * Opisthacanthus rugulosus Pocock, 1896
 * Opisthacanthus surinamensis Lourenço, 2017
 * Opisthacanthus titanus Lourenço, Wilme & Waeber 2018
 * Opisthacanthus valerioi Lourenço, 1980
 * Opisthacanthus validus (Thorell, 1876
 * Opisthacanthus weyrauchi Mello-Leitão, 1948

Current systematics
Subgenus Opisthacanthus Peters, 1861

I. cayaporum group II. lepturus group III. lecomtei group Subgenus Nepabellus Francke, 1974
 * 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)

I. africanus group II. asper group III. laevipes group IV. rugulosus group V. validus group Subgenus Monodopisthacanthus Lourenço, 2001
 * 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

I. madagascariensis group
 * Opisthacanthus madagascariensis Kraepelin, 1894
 * Opisthacanthus punctulatus Pocock, 1896