Sand sharks

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Sand sharks

Obsolete systematic group

The taxon dealt with here is not part of the systematics presented in the German-language Wikipedia. More information can be found in the article text.

Sand tiger shark (Carcharias taurus)

Sand tiger shark ( Carcharias taurus )

Systematics
Subclass : Euselachii
Subclass : Plate gill (Elasmobranchii)
without rank: Sharks (selachii)
Superordinate : Galeomorphii
Order : Mackerel shark (Lamniformes)
Paraphyletic taxon :
Family : Sand sharks
Scientific name
Odontaspididae
Müller & Henle , 1839

The sand sharks (Odontaspididae) are a small family of the sharks (Selachii) and belong to the order of the mackerel shark-like (Lamniformes)

Sand sharks are leisurely swimmers. They have relatively small eyes in relation to the body and do not have a nictitating membrane to protect the eyes. The long, sharp teeth protrude forward and give them a dangerous appearance through the open mouth when swimming. However, they are not aggressive.

The sand sharks experience prenatal cannibalism . Only the two oldest cubs develop and are born. After they have first consumed their own yolk sac, which provides them with the most important nutrients, teeth develop in the first hatched. In the later gestation period, which is between eight and twelve months for sand sharks, the oldest feed on the unfertilized eggs and the sibling embryos.

Systematics

There are three types in two genera. The best known species is the sand tiger shark:

literature

  • Kurt Fiedler, Textbook of Special Zoology, Volume II, Part 2: Fish , Gustav Fischer Verlag Jena, 1991, ISBN 3-334-00339-6 .
  • Joseph S. Nelson, Fishes of the World , John Wiley & Sons, 2006, ISBN 0-471-25031-7 .

Web links

Commons : Sand Sharks  - Collection of images, videos and audio files