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Need Ids On 2 Micros From Cretaceous Matrix


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I found these two specimens in Cretaceous (Turonian age) matrix from Grant Co., South Dakota.

The photos are taken with a USB microscope. I am guessing that the one is a dermal element/thorn. Is it from a ray? The other looks like a mussel. I would like to know the ID of the little shell.

Thanks for looking.

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Julianna

Although some sawfish rostral teeth can have a similar crown, your first specimen because of the flat, rounded base does look like a dermal element/thorn possibly from a Rhinobatos (Guitarfish).

Marco Sr.

Edited by MarcoSr

"Any day that you can fossil hunt is a great day."

My family fossil website     Some Of My Shark, Ray, Fish And Other Micros     My Extant Shark Jaw Collection

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Julianna

Although some sawfish rostral teeth can have a similar crown, your first specimen because of the flat, rounded base does look like a dermal element/thorn possibly from a Rhinobatos (Guitarfish).

Marco Sr.

Thank you Marco Sr., that is what I was hoping. I have found a couple of the sawfish rostral teeth in this matrix and they have quite a different base.

 
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