Catalog Number: CG-0048

A quick accidental find tonight. I stack fossil pieces all over the place. This particular piece has been out in the weather all Winter. The tip of a Petalodus Tooth blade attached to the rock. Upon examining the specimen under the microscope, it found it to be removable. With a pin vice and a ground down flattened high speed steel drill blank, I easily removed it from the limestone.

Specimen still attached to the limestone. The orange below was a suspected second tooth.

Oddly enough, there is a probably second tooth next to this one. It could be the other side of the same tooth. They are not in a natural arrangement, however. If it is indeed the same tooth, I suspect that it was broken before fossilization. The material closely resembles internal tooth matrix. There are parallel ridges that resemble the distal crown tongue of a Petalodus tooth.

Below you can see the simple anatomy of a Petalodus tooth. The distal crown tongue is the region between the cutting blade and the root.

Petalodus Tooth Anatomy
Petalodus Tooth general anatomy
Catalog IDSpecimen NameCrown HeightCrown Width
CG-0015Petalodus I6mm23mm
CG-0016Petalodus II9.5mm24mm*
CG-0029Petalodus III8mm28mm*
CG-0027Petalodus IV10.5mm**
CG-0034Petalodus V14mm27mm*
CG-0038Petalodus VI5.5mm*****
CG-0045Petalodus VII10mm25mm
CG-0047Petalodus VIII13mm31mm
CG-0048Petalodus IX******
CG-0055Petalodus X11mm†28mm
CG-0058Petalodus XI8mm†27mm
CG-0070Petalodus XII******
CG-0087Petalodus XIII9mm23mm
Current specimens found and metric measurements. Crown height measured from start of root on lingual side. This includes a dark band that was originally covered by the distal crown tongue.
* – 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.

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