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Articles related to prehistoric sharks

Prehistoric Sharks and Shark Evolution - Dinosaurs - About.com
If you went back in time and looked at the first, unremarkable prehistoric sharks of the Ordovician period--about 420 million years ago--you might never guess ...
http://dinosaurs.about.com/od/otherprehistoriclife/a/prehistoric-sharks.htm
Prehistoric Shark Pictures - Dinosaurs - About.com
Pictures, illustrations and photographs of prehistoric sharks, ranging from Cladoselache to Xenacanthus.
http://dinosaurs.about.com/od/dinosaurpictures/ig/Prehistoric-Shark-Pictures/
Stethacanthus - About.com Prehistoric Sharks
In most ways, Stethacanthus was an unremarkable prehistoric shark of the late Devonian and early Carboniferous periods--relatively small, but a dangerous, ...
http://dinosaurs.about.com/od/tetrapodsandamphibians/p/stethacanthus.htm
Megalodon - About.com Prehistoric Sharks
The giant prehistoric shark Megalodon is one of the few animals to be identified by its species, rather than its genus, name: technically, this predator is known as  ...
http://dinosaurs.about.com/od/tetrapodsandamphibians/p/megalodon.htm
Cretoxyrhina - About.com Prehistoric Sharks
Sometimes, a prehistoric shark just needs a catchy nickname to attract the attention of the general public. That's what happened with the awkwardly named  ...
http://dinosaurs.about.com/od/tetrapodsandamphibians/p/cretoxyrhina.htm
Cladoselache - About.com Prehistoric Sharks
A strange, scaleless shark of the late Devonian period.
http://dinosaurs.about.com/od/tetrapodsandamphibians/p/cladoselache.htm
Squalicorax - About.com Prehistoric Sharks
The only prehistoric shark known to have preyed on dinosaurs.
http://dinosaurs.about.com/od/tetrapodsandamphibians/p/squalicorax.htm
Orthacanthus - About.com Prehistoric Sharks
This prehistoric shark had a distinctive spine on its head.
http://dinosaurs.about.com/od/tetrapodsandamphibians/p/orthacanthus.htm
Hybodus - About.com Prehistoric Sharks
This medium-sized shark prowled the seas for over 100 million years.
http://dinosaurs.about.com/od/tetrapodsandamphibians/p/hybodus.htm
Otodus - About.com Prehistoric Sharks
Since the skeletons of sharks are composed of biodegradable cartilage rather than longer-lasting bone, often times the only fossil evidence of prehistoric ...
http://dinosaurs.about.com/od/tetrapodsandamphibians/p/otodus.htm
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