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Reviewing, Revising, and Finalizing Prehistoric Animals and Dinosaur Ecology
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<blockquote data-quote="hamishspence" data-source="post: 5007967" data-attributes="member: 41555"><p><strong>shark relationships</strong></p><p></p><p>Interestingly, <em>Otodus</em> isn't aways classed as a relative of the sandtiger. Here, it is described as ancestral to the porbeagle- and great whites and megalodons, while not that closely related, are still closer related than they are to the porbeagle:</p><p> </p><p><a href="http://www.great-white-shark.com/shark-relatives.html" target="_blank">Great White Shark : Relatives, Living & Fossil</a></p><p> </p><p>I'm not sure how well supported this view is, but it does place megalodon as within Lamnidae, rather than as closer related to the sand tiger shark (since Lamnidae includes the Great White, the porbeagle, their most recent common ancestor, and all its descendants.</p><p> </p><p>Even if <em>Otodus</em> and <em>Carcharocles megalodon</em> are related, and both closer related to sand sharks than "mackerel sharks" (Lamnidae), that doesn't mean that they would have looked like sand sharks:</p><p> </p><p><a href="http://www.megalodonexpeditions.com/risefall.htm" target="_blank">http://www.megalodonexpeditions.com/risefall.htm</a></p></blockquote><p></p>
[QUOTE="hamishspence, post: 5007967, member: 41555"] [b]shark relationships[/b] Interestingly, [I]Otodus[/I] isn't aways classed as a relative of the sandtiger. Here, it is described as ancestral to the porbeagle- and great whites and megalodons, while not that closely related, are still closer related than they are to the porbeagle: [URL="http://www.great-white-shark.com/shark-relatives.html"]Great White Shark : Relatives, Living & Fossil[/URL] I'm not sure how well supported this view is, but it does place megalodon as within Lamnidae, rather than as closer related to the sand tiger shark (since Lamnidae includes the Great White, the porbeagle, their most recent common ancestor, and all its descendants. Even if [I]Otodus[/I] and [I]Carcharocles megalodon[/I] are related, and both closer related to sand sharks than "mackerel sharks" (Lamnidae), that doesn't mean that they would have looked like sand sharks: [URL]http://www.megalodonexpeditions.com/risefall.htm[/URL] [/QUOTE]
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Reviewing, Revising, and Finalizing Prehistoric Animals and Dinosaur Ecology
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