Please Help ID more Hell Creek Material

[MrGiggles008]

Hello,

I was hoping to get some more ID help with some material from the Hell Creek Formation.

Formation: Hell Creek

Locale: South Dakota

Known info about the area: This was found in a bone bed that represents river systems from the cretaceous.

Scale: lower scale on calipers is in inches.

 

1) Original ID was a croc tooth, but when I looked on this forum, I started questioning this ID. I now suspect this tooth to be a Thescelosaur premax?

 

2) Original ID was croc vertebrae. I think this is likely correct. This fossil was very fragile and has quite a bit of repair and some matrix/field glue still present. 

 

3) Original ID was a turtle humerus. I think this fits more of a croc humerus profile, love to know what others think. Note: there is still some matrix and glue on specimen. there was a complete break on one end of the bone, so orientation should be close but may not be perfect. 

 

4) This was in my bone fragment pile, but it showed some featuring that made me want to get another opinion before I throw it in the box with the other unidentifiable fragments. I was thinking it could either be the end of a bigger bone or a scute of some kind?

 

5) Again, this was in my bone fragment pile, but it showed some featuring that made me want to get another opinion before I throw it in the box with the other unidentifiable fragments. I was thinking it looked familiar to a toe or finger bone?

[Coco]

1- Please number all photos,

 

2- Thank you also to put the text under each photo concerned, because here we are obliged to scroll to know what you’re talking about and it is not very practical !

 

I will add that it is a lot of pics at once.

 

Coco

[Kohler Palaeontology]

I would believe No. 1 to be a Thescelosaurus pre-max. looks more like one than all of the croc teeth I've seen. And the morphology seems to match.

 

I think No. 2 is a croc vert. this is because of the convex surface on one side and the concaved on the other.

 

can't say much about the others.

 

Kind Regards,

Kohler Palaeontology

 

[hadrosauridae]

Croc and turtle can look very similar, especially in the field, before a good prep job.  I think #1 is thesce, although that round base is probably why it got IDd as croc.  The other bits are unidentifiable bone fragments.  Hell creek is filled with frags and bobs.

[MrGiggles008]

2 hours ago, Kohler Palaeontology said:

I would believe No. 1 to be a Thescelosaurus pre-max. looks more like one than all of the croc teeth I've seen. And the morphology seems to match.

 

I think No. 2 is a croc vert. this is because of the convex surface on one side and the concaved on the other.

 

can't say much about the others.

 

Kind Regards,

Kohler Palaeontology

 

Thanks for the response! I'm glad to find out my thinking wasn't far off.

[MrGiggles008]

3 minutes ago, hadrosauridae said:

Croc and turtle can look very similar, especially in the field, before a good prep job.  I think #1 is thesce, although that round base is probably why it got IDd as croc.  The other bits are unidentifiable bone fragments.  Hell creek is filled with frags and bobs.

Gotcha. Ok awesome! The thescelosaur tooth is definitely a happy surprise. Ya the number 4 and 5 really were a stretch, I just would feel guilty if I threw it in the BOB box without asking for another opinion first. That's likely the consensus though. Thanks for responding!