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Hexanchus

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Title: Hexanchus  
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Hexanchus

Hexanchus
Temporal range: 196–0 Ma
Є
O
S
D
C
P
T
J
K
Pg
N
Sinemurian to Present[1]
Bluntnose sixgill shark
(Hexanchus griseus)
Drawing by Dr Tony Ayling
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Subclass: Elasmobranchii
Superorder: Selachimorpha
Order: Hexanchiformes
Family: Hexanchidae
Genus: Hexanchus
Rafinesque, 1810
Species

See text.

The sixgill sharks, Hexanchus, are a genus of deepwater sharks in the family Hexanchidae. These sharks are characterized by broad pointed heads, six pairs of gill slits, comb-like, yellow lower teeth, and a long tail. It can grow up to 5 m (18 ft) long and weigh over 600 kg (1320 lb).[2] They are abyssal plain scavengers with a keen sense of smell and are among the first to arrive at carrion, together with hagfish and rattails. They show a characteristic rolling motion of the head when feeding. They have been found at depths of up to 2,500 feet (760 m).

Contents

  • Extant Species 1
  • Extinct species 2
  • See also 3
  • References 4
  • External links 5

Extant Species

Extinct species

Fossil teeth of Hexanchus andersoni from Jurassic

See also

References

  1. ^ Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Chondrichthyes entry)". Bulletins of American Paleontology 364: p.560. Retrieved 2008-01-09. 
  2. ^ Kindersley, Dorling (2001,2005). Animal. New York City: DK Publishing.  
  • "Hexanchus".  

External links

  • Large specimen filmed at 1,000 m depth
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