Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Classis: Chondrichthyes
Subclassis: Elasmobranchii
Superordo: Selachimorpha
Ordo: Squaliformes
Familia: Dalatiidae
Genus: Somniosus
Species: S. microcephalus - S. pacificus - S. rostratus
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.
Species
Somniosus antarcticus Whitley, 1939 (southern 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)
References
Bruce J. Welton; James L. Goedert (2016). "New fossil species of Somniosus and Rhinoscymnus (Squaliformes: Somniosidae), deep water sharks from Oligocene rocks of Western Washington State, USA". New Mexico Museum of Natural History and Science Bulletin. 74: 309–326.
Yano, K.; Stevens, J. D.; Compagno, L. J. V. (December 2004). "A review of the systematics of the sleeper shark genus Somniosus with redescriptions of Somniosus (Somniosus) antarcticus and Somniosus (Rhinoscymnus) longus (Squaliformes: Somniosidae)". Ichthyological Research. Springer. 51 (4): 360–373. doi:10.1007/s10228-004-0244-4.
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