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  2. Hybodontiformes - Wikipedia

    en.wikipedia.org/wiki/Hybodontiformes

    Hybodontiformes, commonly called hybodonts, are an extinct group of shark-like cartilaginous fish (chondrichthyans) which existed from the late Devonian to the Late Cretaceous. Hybodonts share a close common ancestry with modern sharks and rays (Neoselachii) as part of the clade Euselachii. They are distinguished from other chondrichthyans by ...

  3. Stethacanthus - Wikipedia

    en.wikipedia.org/wiki/Stethacanthus

    Stethacanthus is an extinct genus of shark-like cartilaginous fish which lived from the Late Devonian to Late Carboniferous epoch, dying out around 298.9 million years ago. Fossils have been found in Australia , Asia , Europe and North America .

  4. Stethacanthidae - Wikipedia

    en.wikipedia.org/wiki/Stethacanthidae

    Stethacanthidae is an extinct family of prehistoric sharks. [1] It is estimated to have existed approximately between 380 and 300 million years ago. Members of this family are noted for their peculiar dorsal fin.

  5. Cretoxyrhina - Wikipedia

    en.wikipedia.org/wiki/Cretoxyrhina

    An analysis of a partially complete tail fin fossil shows that Cretoxyrhina had a lunate (crescent-shaped) tail most similar with modern lamnid sharks, whale sharks, and basking sharks. The transition to tail vertebrae is estimated to be between the 140th and 160th vertebrae out of the total 230, resulting in a total tail vertebral count of 70 ...

  6. How can we stop sharks from going extinct? - AOL

    www.aol.com/news/2014-12-18-how-can-we-stop...

    Sharks could be facing extinction over the next couple of decades. Human interference is largely to blame for the species interference. Overfishing of sharks has increased as the global demand has ...

  7. Helicoprion - Wikipedia

    en.wikipedia.org/wiki/Helicoprion

    Helicoprion is a genus of extinct shark-like [1] eugeneodont fish. Almost all fossil specimens are of spirally arranged clusters of the individuals' teeth, called "tooth whorls", which in life were embedded in the lower jaw. As with most extinct cartilaginous fish, the skeleton is mostly unknown.

  8. They can be the size of great white sharks and they swim in ...

    www.aol.com/size-great-white-sharks-swim...

    Shark research is hard to get funding for, in part, because sharks aren’t a commercial species. Yet the irony is that they affect commercial species, namely fish populations.

  9. Portal:Sharks/Selected pictures - Wikipedia

    en.wikipedia.org/.../Portal:Sharks/Selected_pictures

    The selected pictures are what we believe to be the best pictures on Wikipedia related to sharks.Any image that is featured or valued on the English Wikipedia, or featured, valued or considered high quality on Wikimedia Commons, and is used in one or more articles within the scope of WikiProject Sharks, automatically qualifies, and may be added below.

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