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Carcharhiniformes

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Groundsharks, like this blacknose shark, have a nictitating membrane which can be drawn over the eye to protect it.

Carcharhiniformes /kɑːrkəˈrnɪfɔːrmz/, the ground sharks, with over 270 species, are the largest order of sharks. They include a number of common types, such as catsharks, swellsharks, and the sandbar shark.

Members of this order are characterized by the presence of a nictitating membrane over the eye, two dorsal fins, an anal fin, and five gill slits.

The families in the order Carcharhiniformes are expected to be revised; recent DNA studies show that some of the conventional groups are not monophyletic.

Families

According to FishBase, the eight families of ground sharks are:[1]

Timeline of genera

References

  1. ^ Fish Identification: Ground sharks FishBase. Retrieved 28 March 2013.
  2. ^ Compagno, L.J.V. Family Carcharhinidae - Requiem sharks in Froese, R. and D. Pauly. Editors. 2010. FishBase. World Wide Web electronic publication, version (05/2010).
  3. ^ Froese, Rainer, and Daniel Pauly, eds. (2011). "Hemigaleidae" in FishBase. February 2011 version.
  4. ^ Compagno, Leonard J. V. (1984) Sharks of the World: An Annotated and Illustrated Catalogue of Shark Species Known to Date. Rome: Food and Agriculture Organization. ISBN 92-5-101384-5.
  5. ^ Froese, Rainer, and Daniel Pauly, eds. (2012). "Pseudotriakidae" in FishBase. December 2012 version.
  6. ^ Froese, Rainer, and Daniel Pauly, eds. (2009). "Scyliorhinidae" in FishBase. January 2009 version.
  7. ^ Froese, Rainer, and Daniel Pauly, eds. (2009). "Triakidae" in FishBase. January 2009 version.
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Carcharhiniformes: Brief Summary

provided by wikipedia EN
 src= Groundsharks, like this blacknose shark, have a nictitating membrane which can be drawn over the eye to protect it.

Carcharhiniformes /kɑːrkəˈraɪnɪfɔːrmiːz/, the ground sharks, with over 270 species, are the largest order of sharks. They include a number of common types, such as catsharks, swellsharks, and the sandbar shark.

Members of this order are characterized by the presence of a nictitating membrane over the eye, two dorsal fins, an anal fin, and five gill slits.

The families in the order Carcharhiniformes are expected to be revised; recent DNA studies show that some of the conventional groups are not monophyletic.

license
cc-by-sa-3.0
copyright
Wikipedia authors and editors
original
visit source
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wikipedia EN