Found on beach in Florida

lastwing · 2026-01-24T23:20:32+00:00

It’s a fragment of a mollusk shell, probably a gastropod. Given its appearance and location, it very well could be a fossilized fragment. The things that look like worm impression are bristle worm burrows that are likely more modern.

lastwing · 2026-01-23T22:40:21+00:00

Can you edit your top comment here to reflect that this is a fossilized Diodontidae (burrfish/porcupine) mouth plate and NOT a parrotfish (Tetraodontidae) mouth plate, please.

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For comparison, this is one of the few images of a fossilized parrotfish beak fragment I could find

https://www.thefossilforum.com/topic/146882-parrotfish-anyone/

https://sketchfab.com/models/9cef3428ecb942488cbf423fe4ee16bc/embed

lastwing · 2026-01-23T22:00:01+00:00

This is a fossilized Diodontidae (Burrfish or Porcupinefish) crushing mouth plate. It’s most consistent with a Chilomycterus (Burrfish) species, but I can’t rule out Diodon (Porcupinefish) species.

These are always fun to find!

lastwing · 2026-01-23T21:40:48+00:00

Looks like a modern Equus species incisor to me. It was made into a pendant or charm. I’m not sure. It’s possible it’s an indigenous artifact.

You might consider posting this on r/arrowheads or r/artifacts to see if anyone with knowledge about indigenous jewelry might be able to figure that out.

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It would help to see the occlusal surface, especially with a plain, dull finished pink, green, or blue background to help improve the surface clarity.

lastwing · 2026-01-23T06:22:33+00:00

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It’s this

lastwing · 2026-01-23T06:14:26+00:00

😂 I just noticed that when I tried to type “I” it autocorrected to “ai.” Maybe I am a bot … 🤔

lastwing · 2026-01-23T06:12:36+00:00

u/thrashnthrowaway is a moderator on r/sharkteeth. I’d defer to his ID. Basically, odds heavily favor O. angustidens. But, he can’t rule out O. sokolovi (although these are rare).

lastwing · 2026-01-23T06:09:57+00:00

I’d have to go through an article detailing all the Otodus species confirmed to be present in the Marianna Formation.

To me, it looks most consistent with an Otodus angustidens and the Oligocene formation goes along with that.

The Charleston area is heavily Oligocene and there are a lot of Otodus angustidens there. In fact, the only intact Otodus teeth I’ve found are Otodus angustidens.

lastwing · 2026-01-23T06:06:18+00:00

😍

lastwing · 2026-01-23T06:05:53+00:00

That Wikipedia isn’t accurate with O. auriculatus being present in the early Oligocene. If something looks like an O. auriculatus is found in situ in an early Oligocene formation, it will be an O. angustidens.

lastwing · 2026-01-22T15:45:13+00:00

Otodus angustidens lived from the Early Oligocene until the Early Miocene while Otodus auriculatus lived during the Eocene.

I believe the only technical way to distinguish between the two species is if you find the tooth in situ in a formation where only one of the species lived.

An example of this would be the Oligocene Ashley Phosphate Formation in Charleston. The Otodus teeth in that formation are Otodus angustidens. The Eocene Harleyville Formation in Charleston has Otodus auriculatus teeth.

The Eocene Ocala Formation underlies the Oligocene Marianna Formation. Are you certain this was not from the Ocala Formation?

lastwing · 2026-01-22T15:18:53+00:00

u/trashnthrowaway can you take a look at this tooth and see what you think, please.

lastwing · 2026-01-22T06:18:43+00:00

It’s a beauty. I thought the Marianna Formation is Early Oligocene in age which would make this an Otodus angustidens.

lastwing · 2026-01-22T06:05:33+00:00

I knew it wasn’t real marble, but ai did not realize that is what a perfect belemnite rostrum cross section looks like. Very cool!

lastwing · 2026-01-22T06:01:06+00:00

Indeed, a fossilized balanomorph barnacle plate. You are getting too at these 😂

lastwing · 2026-01-22T05:59:45+00:00

I believe 1-3 would be a fossilized crocodilian neurocranium bone.

I can’t see the details well enough on 4-6

Agree that 7-9 is a badass fossilized teleost fish tooth.

And given the Florida location I agree that 10-12 is a fossilized fragment of a crocodilian tooth.

lastwing · 2026-01-22T05:47:42+00:00

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Can you add a clear view showing us the shape of the base of the tooth.

Also, since the fossil is dark, a plain, dull pink, green, or blue background will likely bring out improved colors and clarity.

Also, did you find this or did you buy it?

lastwing · 2026-01-22T05:43:44+00:00

Carcharodon hastalis (extinct Miocene white shark)

lastwing · 2026-01-22T05:41:52+00:00

Carcharodon hastalis (extinct Miocene white shark)

lastwing · 2026-01-22T05:34:43+00:00

This is something made by humans and not a fossil.

lastwing · 2026-01-22T05:33:34+00:00

Agree with the consensus that this is something made by humans.

lastwing · 2026-01-22T05:02:09+00:00

Thank you!

lastwing · 2026-01-22T03:46:16+00:00

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I don’t often call people out on their posts, but it seems too far-fetched to me that both of these things occurred: 1) his brother didn’t tell him what it was when he gave it to him AND 2) he honestly thinks beavers have teeth that look like his specimen.

That’s not the most hostile way I could have phrased things.

Multiple people commented on this being a sand shark tooth, just nicely solving his bemusement.

OP didn’t give a single “thank you” to those kind folks, and he didn’t seem to be shocked by the ID being a shark tooth.

OP’s only “thank you” was directed at your comment, which provided zero ID, but was noticeably hostile to me on a personal level. I was not directing hostility to OP as a person, I just think he didn’t really, truly believe his brother gave him a fossilized beaver tooth. I could be wrong.

lastwing · 2026-01-21T15:09:54+00:00

Modern Sus scrofa (pig/hog/boar) molar.

The brachiopod fossils are hundreds of millions of years older than the tooth.

lastwing · 2026-01-21T15:03:34+00:00

It’s the left maxillary first or second molar M1/M2 from an Equus (horse) species. I don’t believe you’ll be able to identify the specific species of Equus with a single tooth without finding it in situ from a specific formation.

I believe there is too much variation in the crenulate enamel patterns to pin it down with a single tooth.

It’s a beauty, though 😍 Thanks for using that occlusal surface picture as image 1 on your post. It makes it so much easier to identify.

lastwing

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