Kingdom Animalia Linnaeus, 1758 - animals
Phylum Arthropoda Siebold, 1848 - arthropods
Subphylum Chelicerata Heymons, 1901
Class Arachnida Lamarck, 1801
Order Scorpiones Koch, 1837 - scorpions
Suborder Neoscorpionina Thorell & Lindström, 1885
Infraorder Orthosternina Pocock, 1911
see Infraorder Orthosterni Pocock, 1911
Family Hormuridae Laurie, 1896
Genus †Protoischnurus Carvalho & Lourenço, 2001