Osteoderm ID request, Holden Beach, NC USA

[freeeicecream]

Hi! I've recently collected a number of osteoderm fragments and I'm trying to identify what organism (s) they came from. 

 

These were all collected from Holden Beach, NC USA. Holden has recently had the beach "renourished" which stirred up a lot of specimens from the Peedee formation. 

 

I think the majority of these are from a soft shelled turtle, but I'm very novice

[Rockwood]

I'm not an expert on them, but I'll be surprised if you aren't correct about these. 

Edit: Calling them osteoderms isn't incorrect, but it may be incomplete. 

Edited February 5, 2023 by Rockwood