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 Interaktive Phylogenetic Tree of Sharks -> Order "Frilled and cow sharks"

The Order "Frilled and cow sharks"

This order is the most ancient one. It consists of 6 species (2 families and 4 genera). The most distinguishable feature is the possession of 6 or even 7 gill slits. This is considered a very primitive feature, as most modern sharks possess only 5 gill slits. Compared to sharks of other orders, frilled and cow sharks only have one dorsal fin.
These sharks have a widespread distribution and live preferably in deeper waters.
The knowledge about their biology is still fragmentary.

© SeaPicsThe 7 gill slits of the
broadnose sevengill shark
  Typical species of the order of "Frilled and cow sharks":

Bluntnose sixgill shark
© Saul Gonor / SeaPics

The Families of the "Frilled and cow sharks"
  • Frilled sharks (Chlamydoselachidae) > more

  • Cow sharks (Hexanchidae) > more


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