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In two lbs of Peace River micro matrix, I identified these 8 items as fish vertebrae (+1 discovered in the "coral" pile). Grid lines are 1mm apart. Are the bottom and right pieces on the lower row eroded shark (or ray) verts? I also sorted the item below into the vert pile, but upon photographing it, I became less sure. Instead of having a half-round profile when viewed end on, it was more linear, like a cannoli shell. Unfortunately, it popped out of my forceps before I could take photos of other orientations, and now it's lost forever. But on the off chance these two photos are enough for an ID, here you go:

I have several thousand well preserved shark and ray vertebrae from the Eocene of Virginia. I also have many more thousands of bony fish vertebrae from the Eocene of Virginia. See the group pictures in this post. The paper plates are 9 inches in diameter for size reference. There is very little written on fossil shark and ray vertebrae that I can find in the literature and what is written is scattered throughout a good number of different papers. I have a unique, extensive assemblage of many different vertebrae types and forms which represent the fish species from the Eocene of Virginia that could be the basis of a very comprehensive paper on fossil shark, ray and bony fish vertebrae. After two years of looking for a fish researcher interested in studying these vertebrae and writing a paper, which in my opinion is really needed to help with fossil fish vertebrae identification, I’ve finally found a renowned fish researcher who is very interested. In an e-mail reply after seeing pictures of the vertebrae, he stated “I can tell you the shark, ray, and bony fish vertebral centra are worth describing! They appear to be beautifully preserved! The dataset looks exciting to me”. I’m hoping that different fish vertebrae types can be identified and described and realize it will be extremely difficult, with the current state of both fossil and extant fish vertebrae research, to try to identify the vertebrae further to fish family/genera/species. I will donate all of the vertebrae so there is a large comparative sample to go along with those vertebrae specifically described in any paper. Pictures of the shark and ray vertebrae ( 1.5 mm to 20 mm): Continued in the next reply. Marco Sr.

I'm new at this stuff and have no clue how to recognize a fossil but I think this may be one. I found this 1 week ago in Arizona just north of phoenix, near the salt river. Any help is appreciated.

How do you differ between bony fish vertebrae and shark vertebrae? What about these three vertebrae from Kiowa formation (Albian)? #1: approximately 5.5mm wide and 3mm thick. #2: approximately 5.5mm wide and 2.3mm thick. #3: approximately 4.8mm wide and 2.3mm thick.

I'm quite used to finding small fish vertebra from these small sized fish coprolites @GeschWhat from the Oxford Clay of Peterborough. But this one below has more of a shark vertebra appearance, or are there different variations of fish vertebrae. All vertebrae measuring between 2 and 3 millimetres. This one below is also a fish vertebra.

We went beachcombing at McFaddin Beach near Sabine Pass, Texas yesterday and found some interesting bones as well as a mammal tooth yesterday. I am aware that most of these are likely not fossils but I was still wondering if someone can still tell me what they are.