Pisco Formation Carcharhinus teeth

[fossilsonwheels]

I’m starting to work on the Carcharhinus and related shark displays. I’ve got three teeth from the Pisco Formation, Sacaco location that I can’t quite nail down as far as ID. I know they could end up being Carcharhinus sp but I thought I’d give an ID post a chance. I’m not really confident in my ability to ID the gray sharks. 
 

The first two look like they might be C. obscurus to me but I know there would be other possibilities. They are both right around 13mm on the slant so not very large. The first one is in better shape, the second is pretty worn. 
 

The third tooth is actually a really cool looking tooth. It’s about 10mm on the slant and 14mm wide. This one has me pretty stumped. Could be a C. brachyurus but none of the teeth in my collection match it enough for me to be sure. 

[ThePhysicist]

The first is a good match to dusky, the second is a bit worn but dusky isn't a bad guess for that one too.

 

 

I'm not so confident on the third, C. brachyurus seems like a decent guess.

 

^ http://naka.na.coocan.jp/JAWCarcharhinidae.html

 

 

Edited June 1, 2023 by ThePhysicist

[fossilsonwheels]

14 hours ago, ThePhysicist said:

The first is a good match to dusky, the second is a bit worn but dusky isn't a bad guess for that one too.

 

 

I'm not so confident on the third, C. brachyurus seems like a decent guess.

 

^ http://naka.na.coocan.jp/JAWCarcharhinidae.html

 

 

Thanks for the information and help ! I used the dentions on Naka and didn’t see anything that was a better fit for the third one.