Somniosus

Somniosus is a widely distributed genus of deepwater dogfish sharks in the family Somniosidae.^[2] Several members of the genus are believed to attain lengths up to 7 m (23 ft), thus ranking among the largest of sharks.

Somniosus Temporal range: Early Oligocene to present PreꞒ Ꞓ O S D C P T J K Pg N [1]
Somniosus microcephalus
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Elasmobranchii
Division:	Selachii
Order:	Squaliformes
Family:	Somniosidae
Genus:	Somniosus Lesueur, 1818
Type species
Squalus microcephalus

Species

• Somniosus antarcticus Whitley, 1939 (southern sleeper shark)
• Somniosus cheni Hsu, Lin, & Joung, 2020 (Taiwan sleeper shark)
• †Somniosus gonzalezi Welton & Goedert, 2016 – fossil, Oligocene
• Somniosus longus Tanaka, 1912 (frog shark)
• Somniosus microcephalus (Bloch & J. G. Schneider, 1801) (Greenland shark)
• Somniosus pacificus Bigelow & Schroeder, 1944 (Pacific sleeper shark)
• Somniosus rostratus A. Risso, 1827 (little sleeper shark)
• Somniosus sp. A Not yet described (longnose sleeper shark)

• 
  Somniosus microcephalus
• 
  Somniosus pacificus
• 
  Somniosus rostratus
• 
  Somniosus antarcticus

See also

• Sharks portal

• List of prehistoric cartilaginous fish