6.08.2008

Whorl-tooth



Helicoprion
National Museum of Natural History, Smithsonian Institution, Washington DC

Though it is not clear by looking at it, this is perhaps one of the most interesting vertebrate dentitions. It is actually the teeth of the lower jaw of an ancient shark that lived from 280 to 225 million years ago. The entire set of lower teeth is visible. How it captured prey with this unique structure is not understood. Here is what it would have looked like in life:












2 comments:

Welcome said...

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-dαиιεl- said...

that fish is sooo coool!! =)


nice!!... one more thing to my brain... =)