Třída: Chondrichthyes - paryby
Řád: Squaliformes - ostrouni
Čeleď: Somniosidae -

Typový druh: Somniosus brevipinna Lesueur, 1818

Reference: Lesueur C. A. 1818. Description of several new species of North American fishes. J. Acad. Nat. Sci. Phila. v. 1 (pt 2). 222-235; 359-368.

Přehled druhů

• Somniosus antarcticus Whitley 1939
  Whitley, G. P. 1939. Taxonomic notes on sharks and rays. Aust. Zool. v. 9 (pt 3): 227-262, Pls. 20-22.
• Somniosus longus (Tanaka, 1912)
  Tanaka, S. 1912. Figures and descriptions of the fishes of Japan, including Riukiu Islands, Bonin Islands, Formosa, Kurile Islands, Korea and southern Sakhalin. Fig. Descr. Fish. Japan v. 6: 87-108, Pls. 26-30.
• Somniosus microcephalus (Bloch & Schneider, 1801)
  Světloun malohlavý
  Bloch, M. E. & J. G. Schneider. 1801. M. E. Blochii, Systema Ichthyologiae iconibus cx illustratum. Post obitum auctoris opus inchoatum absolvit, correxit, interpolavit Jo. Gottlob Schneider, Saxo. Berolini. Sumtibus Auctoris Impressum et Bibliopolio Sanderiano Commissum. Systema Ichthyol.: i-lx + 1-584, Pls. 1-110.
• Somniosus pacificus Bigelow & Schroeder, 1944
  Světloun pacifický
  Bigelow, H. B. & W. C. Schroeder. 1944. New sharks from the western North Atlantic. Proc. New England Zool. Club v. 23: 21-36, Pls. 7-10.
• Somniosus rostratus (Risso, 1827)
  Světloun dlouhorypý
  Risso, A. 1827. Histoire naturelle des principales productions de l'Europe méridionale, et particulièrement de celles des environs de Nice et des Alpes maritimes. F. G. Levrault, Paris & Strasbourg. Hist. Nat. Europe Mérid. v. 3: i-xvi + 1-480, Pls. 1-16.

Statistické údaje

Počet druhů: 5