Rare Pennsylvanian Peripristis Shark Tooth from Oglesby, Illinois

[Nimravis]

On Saturday I posted pics from a Fossil Hunting Trip that I did the day before at a road cut in Ogelsby, Illinois.This area contains fossils from this formation-  La Salle Limestone member of the Bond Formation (Missourian, Pennsylvanian) Unit 3. On of the pics that I posted was of something that I did not recognize and as always happens on the forum, someone responds with an identification. FF Member @Archie (Sam) stated that it was a Peripristis shark tooth and later stated that it was the lingual view. I then did some searching on the internet for pictures of this type of tooth and  Sam was right on. During my search, I also came across an article titled "Pennsylvanian (Late Carboniferous) chondrichtyans from the LaSalle limestone member (Bond Formation) of Illinois, USA. This paper was written by Dr. Stephen L. Brusatte , who is a Chancellor's Fellow in Vertebrate Paleontology at the University of Edinburgh- (He grew up in Ottawa, IL. a town very close to Oglesby). Dr. Brusatte is an American Paleontologist and Evolutionary Biologist who specializes in the anatomy and evolution of dinosaurs. I found his e-mail address and late last night I e-mailed him pictures of this tooth and he responded early this morning and confirmed what Sam had stated. He further stated that "shark teeth are quite rare in the Pennsylvanian rocks of the Oglesby area". 

 

Sam, thanks again for helping me out with this ID.

 

[Archie]

Congratulations again on a rare and beautiful find! Just read the paper and it was very interesting.

My pleasure glad I was able to help! Good luck finding more of these and the beautiful invertebrates  

[Fossildude19]

Excellent find, Ralph!

Congratulations. 

[Gizmo]

Great find, congrats! 

[ynot]

Great find.

[Nimravis]

52 minutes ago, Fossildude19 said:

Excellent find, Ralph!

Congratulations. 

Thanks and a further thanks for placing the link into my post.

[Nimravis]

Thanks @ynot and @Gizmo . 

[Tidgy's Dad]

Well done, Ralph, what an excellent find! 

And fair play @Archie Top id! 

(Though i still prefer the brachiopods, myself!) 

 

[Innocentx]

Everything about this tooth is exceptional, but I especially like the dramatic coloration. Congratulations on this rarity!

[Nimravis]

1 hour ago, Innocentx said:

Everything about this tooth is exceptional, but I especially like the dramatic coloration. Congratulations on this rarity!

Thanks- I also like the coloration. 

[jdp]

Very nice petalodont tooth. The first Paleozoic vertebrate fossil I ever found was a petalodont (Petalodus, not Peripristis, but close enough!) so I'm always excited to see these. Very nice fossil!

[Innocentx]

13 hours ago, jdp said:

Petalodus, not Peripristis

Just curious about how you came to this conclusion. I'm examining biting edge and can see how

this might go either way. Is the shape of the root part of your determination?

[jdp]

No, I mean that the first tooth I found was Petalodus. Nimravis's specimen is almost certainly Peripristis.

[Innocentx]

Ah. Your comment wording threw me off.  

[jdp]

No worries. Sometimes sentences come out wrong.