Catalog Number: CG-0045
Yesterday I discovered a first local Petalodus tooth that was removable from the matrix. It’s the first time I’ve been able to examine one in three dimensions easily. I was not aware of how flat one side is compared to the other. There is a root, however it became detached when the tooth came out. I plan on gluing it back together with some Paraloid B-72. The root is still attached to the matrix.
The rock I found it on was on limestone that appeared to be weathered by water. The face was weathered free and water had removed the outer enamel that has remained on most of my other specimens. The positive side to this was the tooth easily came out of the rock.
While the above photo shows a shallow root, it appears to be twice as long. I removed part of the matrix that traps the root and the backside of it extends further than I thought. There is a clearly defined distal crown tongue on the the side of the above photo.
This tooth really changed my preconception of what shape they are. I’ve seen countless illustrations and descriptions, but none helped me imagine what it looked like in person.
This being my seventh tooth, they all up until this point have been found embedded in Brush Creek Limestone. While other limestone my allow pieces to weather out, and teeth have been found in shales in other places, so far I have only recovered teeth from cement
Other Local Petalodus Specimens
|Catalog ID||Specimen Name||Crown Height||Crown Width|
* – Measured based on symmetry. One side broken/obscured.
** – Unable to measure, both sides broken.
*** – From top of distal crown tongue.
**** – Unable to measure, crown broken.
† – Measured from labial side.
I am currently in the process of collecting information and research about Petalodus Teeth in general. I have an online page that is a subset of that research. Petalodus Research Page.