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We’ve had some dispute about this shark tooth. Bought on the Isle of Wight in a box labelled “Sand Shark teeth”


KingSepron

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Me and my friends are convinced this isn’t a sand shark tooth. But we can’t agree on what it is, between Cretolamna and Otodus (of course it could be neither, we are idiots)

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Edited by KingSepron
I got something wrong
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Looks like it might an Otodus. But I could be wrong :headscratch:

Accomplishing the impossible means only that the boss will add it to your regular duties.

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It's not a sand shark because one of those of any species would have a clear nutrient groove.  The photo is a little dark and it would be great to get a photo from the other side and a profile view, but it's an Otodus.  It has a definite bourlette, that lighter-colored half-moon shaped area at the base of the crown, which Cretalamna doesn't have.  It's hard to say from the photo but it also might have a distinct lingual protuberance on the root, that being a curved outgrowth of the root.  That is something you see in Otodus while Cretalamna has a relatively flatter root surface there.

 

Jess

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13 minutes ago, siteseer said:

It's not a sand shark because one of those of any species would have a clear nutrient groove.  The photo is a little dark and it would be great to get a photo from the other side and a profile view, but it's an Otodus.  It has a definite bourlette, that lighter-colored half-moon shaped area at the base of the crown, which Cretalamna doesn't have.  It's hard to say from the photo but it also might have a distinct lingual protuberance on the root, that being a curved outgrowth of the root.  That is something you see in Otodus while Cretalamna has a relatively flatter root surface there.

 

Jess

Wow, thanks for the explanation!

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