What kind of Jawbone?

[Bringing Fossils to Life]

A few months ago I found this bone at Red Hill before I learned of the need for a permit but didn't grasp its significance. Later I realized it was a jawbone section with four small teeth in it. Unfortunately I dropped it and the end of the  most complete tooth fell off, but not before I was able to take pictures. I have not tried to finalize preparation for fear of destroying the remaining teeth. I can't see any sutures, at least not in the place they would be for a tetrapodomorph, and the teeth look more like Hyneria anyway. However, all Hyneria jawbones I've seen have two rows of teeth, a small one and one with longer fangs. The cross section is also hard to place. The teeth seem to start out round and flatten as it goes up. The first picture is as the bone is now and the second shows what the complete tooth looked like before it broke. Scale bar 1cm broken into 5mm halves. Teeth magnified 20x.

 

Edited February 17, 2023 by Bringing Fossils to Life

[Fossildude19]

@jdp

[rocket]

reminds me to the devonian Hyneria lindae, have had a jawbone from this fish from same site some years ago

 

[Bringing Fossils to Life]

Could you post a picture of it? For comparing?

[rocket]

Do not have a pic, had it some years ago and was gone fast. As I remember the sculpture and shape of the tooth was similar to yours.

[Bringing Fossils to Life]

Here is a picture of a Hyneria jawbone from devonIanfish25's post in 2014. I added two views into the same picture. On one side there are small teeth and on the other big teeth. I don't see this on mine. Could it be only the outer edge of the jaw? Or from another fish we don't know the jawbone of?