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Squalidae

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Title: Squalidae  
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Squalidae

Dogfish sharks
Temporal range: Upper Cretaceous–Recent
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Spiny dogfish, Squalus acanthias
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Subclass: Elasmobranchii
Superorder: Selachimorpha
Order: Squaliformes
Family: Squalidae
Genera

Squalidae, also called dogfish sharks or spiny dogfishes,[2] are a family of sharks in the order Squaliformes. They have two dorsal fins, each with smooth spines, but no anal fin, and their skin is generally rough to the touch.[1] Unlike virtually all other shark species, dogfish sharks possess venom which coats their dorsal spines – this venom is mildly toxic to humans.

These sharks are characterized by teeth in upper and lower jaws similar in size; caudal peduncle with lateral keels; upper precaudal pit usually present; and a caudal fin without subterminal notch.

They are carnivorous, principally preying upon organisms smaller than themselves.

The livers and stomachs of the Squalidae contain the compound squalamine, which possesses the property of reduction of small blood vessel growth in humans.[3]

There are two genera: Squalus, which contains numerous species, and Cirrhigaleus, which has three species.

References

  1. ^ a b Froese, Rainer, and Daniel Pauly, eds. (2009). "Squalidae" in FishBase. January 2009 version.
  2. ^
  3. ^ National Geographic June 1998

Further reading

  • Froese, Rainer, and Daniel Pauly, eds. (2011). "Squalidae" in FishBase. February 2011 version.
  • Compagno, Dando, & Fowler, Sharks of the World, Princeton University Press, New Jersey 2005 ISBN 0-691-12072-2
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