Position in a system
| system | Vitae - living organisms |
| domain | Eukaryota Whittaker & Margulis, 1978 - lifeforms with nucletic cells |
| superregnum | Unikonta |
| system | Opisthokonta Cavalier-Smith, 1987 |
| kingdom | Animalia Linnaeus, 1758 - animals |
| subregnum | Eumetazoa Butschli, 1910 |
| divisio | Bilateria Hatschek, 1888 - bilaterians |
| subdivisio | Deuterostomia - deuterostomes |
| phylum | Chordata Bateson, 1885 - chordates |
| subphylum | Vertebrata Cuvier, 1812 - vertebrates |
| infraphylum | Gnathostomata Zittel, 1879 - jawed vertebrates |
| class | Chondrichthyes Huxley, 1880 - cartilaginous fishes |
| subclass | Elasmobranchii Bonaparte, 1838 - sharks, rays and skates |
| sectio | Neoselachii Compagno, 1977 |
| order | Batoidei - rays and skates |
| suborder | Torpediniformes Buen, 1926 - electric rays |
| family | Narkidae Fowler, 1934 - sleeper rays |
| genus | Narke Kaup, 1826 |
| species | Narke capensis (Gmelin, 1789) - Cape Numbfish |
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