Overview

Distribution

Distribution: Atlantic, Indian and Pacific Oceans. No lateral teeth or barbels. Dorsal fin with or without spines. The 5 gill openings anterior to pectoral fin. Maximum length at 6.3 m, reported for Somniosus microcephalus. This family includes the smallest sharks in the world.
  • MASDEA (1997).
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Source: World Register of Marine Species

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage

Barcode of Life Data Systems (BOLD) Stats
                                        
Specimen Records:1,207Public Records:364
Specimens with Sequences:1,037Public Species:22
Specimens with Barcodes:777Public BINs:6
Species:40         
Species With Barcodes:38         
          
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Source: Barcode of Life Data Systems (BOLD)

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Barcode data

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Source: Barcode of Life Data Systems (BOLD)

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Locations of barcode samples

Collection Sites: world map showing specimen collection locations for Squalidae

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Source: Barcode of Life Data Systems (BOLD)

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Wikipedia

Squalidae

Squalidae, also called dogfish sharks or sometimes 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 carnivores and prey 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]

References[edit]

  1. ^ a b Froese, Rainer, and Daniel Pauly, eds. (2009). "Squalidae" in FishBase. January 2009 version.
  2. ^ "Squalidae". Integrated Taxonomic Information System. Retrieved 16 November 2013. 
  3. ^ National Geographic June 1998
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