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fossil shark tooth | measuring in inches in centimeters


Darrell Barnes

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Darrell Barnes

Here is a video I made, measuring the cusp of a Scapanorhynchus fossil shark tooth from Frankstown, MS.  I used the technique suggested by a previous post regarding the measurement of the tooth cusp of "Carcharocles, Carcharodon and Isurus using anterior teeth."  Does the technique and measurement I performed appear legitimate?

 

fossil shark tooth | measuring in inches in centimeters

Scapanorhynchus cusp measurement for fossil forum.PNG

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Here is a TFF post that mentions “crown height” which is what you are measuring. Is crown height the same as your cusp height?

 

http://www.thefossilforum.com/index.php?/topic/94335-measuring-length-of-a-tooth/

 

Here is how sellers of Megalodon teeth measure slant height: 

 

https://www.darkwatermegs.com/megalodon-teeth-information/how-big-is-my-megalodon-tooth/how-to-measure-a-shark-tooth.html

 

Megalodon crown height: 

 

https://www.fossilguy.com/topics/megsize/megsize.htm

 

 

 

 

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Darrell Barnes

Thank you for your prompt response!

 

Crown height is what I am measuring.  I haven't been "swimming" long enough in the learned fossil community to know the appropriate lingo.

 

From the links you posted, slant height would certainly get me a much larger tooth dimension.  It also appears the standard of measurement in the commercial market....much easier to accomplish than the perpendicular line method I used.

 

The problem I face with Scapanorhynchus is that the top row of teeth might fit the slant height measurement nicely (since their appearance in shape is similar to Megalodon, though smaller), but the bottom row of teeth have impressive roots that are quite extensive.

 

I like the crown height measurement I used, because it seems blatantly honest.

 

It may not matter the method used, just so one specifies.  

Edited by Darrell Barnes
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