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Polyrhizodus lingual view

Archie

By Archie

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Polyrhizodus sp.
Lower Carboniferous, Visean
Charlestown Main Limestone
Central Belt of Scotland
330 mya
20.5x18mm

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From the album:

Scottish Lower Carboniferous marine shark teeth

· 16 images
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  • 25 image comments

Photo Information

  • Taken with PENTAX RICOH IMAGING PENTAX WG-3
  • Focal Length 5.5 mm
  • Exposure Time 1/45
  • f Aperture f/3.1
  • ISO Speed 125
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Fossildude19

Fossildude19

Posted

Someone's been busy!

Another Spectacular tooth!

Way to go, Sam!

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Archie

Thanks Tim =]

I have a backlog of shark teeth to prep and repair and post!

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Ridgehiker

I have a tooth  that looks identical from the Visean of our nearby Rocky Mountains.  What's uncanny is even the preservation is the same. Most of our Visean teeth have a bit of a shiny finish but my tooth (like yours) has that same matt finish..

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Archie
On 22/12/2016 at 4:18 AM, Canadawest said:

I have a tooth  that looks identical from the Visean of our nearby Rocky Mountains.  What's uncanny is even the preservation is the same. Most of our Visean teeth have a bit of a shiny finish but my tooth (like yours) has that same matt finish..

That's very interesting, I'd really like to see it if you have a photo! Ive been doing a bit of research on it and I think was mistaken in identifying it as a Polyrhizodus sp. and that it more likely belongs to the genus Tanaodus. There is a chip in the crown showing tubular dentine which is unusual in Petalodonts, the only other Petalodont tooth I have seen this in is Ctenoptychius which morphologically are extremely similar to this tooth (aside from the coronal crest of their crowns being divided into cusplets). Its interesting how some some of these teeth have a matt finish and some of them a shiny finish, this seems to vary within even the same species at different sites and even different beds at the same sites in Scotland.  

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