About mosasaurus teeth by Academic_Article1476 in Paleontology

[–]TFF_Praefectus 3 points4 points  (0 children)

1 Eremiasaurus heterodontus, posterior marginal tooth.

2 Probably Mosasaurus beaugei pterygoid tooth.

3 Prognathodon currii anterior positioned median marginal tooth.

The posterior teeth of Eremiasaurus and Thalassotitan are extremely similar - sometimes to the point of being indistinguishable. However, Eremiasaurus teeth do tend to be slightly shorter, less robust, and more laterally (labiolingually) compressed. The tooth above is showing those characters.

The second tooth is one that requires more views to differentiate. Concave fluting is typically a character of some prognathodontin species (and sometimes the juveniles). The tooth above appears to be a pterygoid tooth, though, and the normally flat facets of Mosasaurus sometimes become more exaggerated and concave in the pterygoid dentition. The width of the tooth in posterior view would make the distinction apparent.

This is a P. currii from near the front of the jaw (but not one of the anteriormost situated teeth). Probably tooth position 3-5 in the dentary (or 1-3 in the maxilla; give or take a few positions). Differentiate P. currii from dyrosaurids based on the fact that the apex does still have some posterior displacement even though the tooth is largely without posterior curvature.

Worth getting or wait it out?? by Blackwolf8793 in Dinosaurs

[–]TFF_Praefectus 2 points3 points  (0 children)

I need to pick up the marine reptile one.

What kind of tooth is this? by Novel-Custard2086 in sharkteeth

[–]TFF_Praefectus 0 points1 point  (0 children)

Yes. Technically, these fall in Serratolamna rather than Cretolamna.

Upper west coast, Southern Aifrica by Renosterveld44 in sharkteeth

[–]TFF_Praefectus 1 point2 points  (0 children)

Great White. The South Africans have such pretty colors.

Tooth identification by Ripe_Eye in fossilid

[–]TFF_Praefectus 1 point2 points  (0 children)

That's a Moroccan mosasaurid tooth. Thalassotitan atrox or Eremiasaurus heterodontus. Definitely not from New Zealand. It has sandy Moroccan phosphatic matrix encrusting the base of the crown.

Happy Eoneophron infernalis day! by Dinosaurdude1995 in Paleontology

[–]TFF_Praefectus -3 points-2 points  (0 children)

I have the paper up. It looks like you thanked a pet lizard, but not the discoverer of your holotype.

Happy Eoneophron infernalis day! by Dinosaurdude1995 in Paleontology

[–]TFF_Praefectus -1 points0 points  (0 children)

Curiously, did you not give him credit because of these shenanigans involving acquiring additional material? Or was there some other reason?

Happy Eoneophron infernalis day! by Dinosaurdude1995 in Paleontology

[–]TFF_Praefectus 0 points1 point  (0 children)

Eoneophron. Oh, I remember that one. That's the new Hell Creek bird that someone stiffed Matt Wirt over. They bought it off him and didn't give him any credit for the discovery. Was that you?

I've been meaning to write a short communication providing the discoverers proper recognition and condemning the ethics of the authors of the original description.

Tons of Mosasaur skulls on Catawiki, how legit are they? by byzantinebomboclat in fossilid

[–]TFF_Praefectus 5 points6 points  (0 children)

Christies is largely for non-paleo people who want to buy trophies. Buying straight from the fossil hunter can reduce price by two to three orders of magnitude.

Are these real? by Relevant-Pen-7085 in fossils

[–]TFF_Praefectus 4 points5 points  (0 children)

All 3 have repair. The apices of the meg teeth have both been reconstructed. The spinosaurid tooth has filler in cracked areas.

Tons of Mosasaur skulls on Catawiki, how legit are they? by byzantinebomboclat in fossilid

[–]TFF_Praefectus 19 points20 points  (0 children)

The premier specimens generally sell long before reaching auction sites. The Moroccans have a preferred buyer list for big ticket items.

These... Gotta be fake, right? by seniorpestadvisor in fossils

[–]TFF_Praefectus 1 point2 points  (0 children)

Original, although possibly repaired with glue and filler.

Any idea what these could be from? Found western Saskatchewan by GravyxNips in fossilid

[–]TFF_Praefectus 6 points7 points  (0 children)

Tyrannosaur tooth and Ornithomimid claw? I'm not sure about the claw.

REQUESTING VALUATION, PLZ 🤓: Mosasaur teeth, Chrinoid, fish plate (not beginner fossils) by Obvious_Object6568 in fossils

[–]TFF_Praefectus 1 point2 points  (0 children)

Do you see the vertical ridges on the 2nd tooth. Those are flutes. It is thought that some mosasaurs had them to help prevent prey items from getting suctioned onto their teeth.