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niger and judith river vertebrae id help


Haravex

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I'll start with the jrf vertebrae which I believe to be a hadrosaur cervical wondering if it is possible to narrow it down to a species if possible? And again anyone who is taking the time to look over these I thank you very much in advance. 

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Forgot to add Hill County, Montana. centrum hight 4.9cm width 7.24cm, traverse processes width 17.6cm centrum and neural spine hight 16.5cm

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Your JRF vert appears to be an anterior dorsals possibly even D1 or 2, it's missing the anterior side of the centrum

.   Multiple hadrosaurs in the JRF difficult to ID any closer

View of a Edmontosaurus regalis 

20210411_121510.thumb.jpg.409d20c30532d19540b098b07dd73c93.jpg

Book Hadrosaurs by Eberth and Evans

 

 

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Ok thanks for the additional information about the position, also was wondering about the vertebrae maybe having some species characteristic. So the only differences on jrf hadrosaurs will most likely be the skull? 

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LordTrilobite

I was about to say the same. Anterior dorsal hadrosaur vert for the first one.
Hadrosaurs do have postcranial differences, but those are generally hard or impossible to spot. There's a lot of species in Judith River, so I don't think you'll be able to get any closer than Hadrosauridae.

 

The Niger vert looks like croc dorsal to me. Very similar to those in Kem Kem.

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Thanks for the information both troodon and LT and taking the time to reply and your expertise.

 

Moving now to gadofaua elrhaz formation. I suspect these to be crocodile and there is two different types out of the 15 vertebrae I have.

PSX_20210324_222520.jpg

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Good stuff can box them off then, the only thing I did want to ask @LordTrilobite that extended bit of the vertebrae on the ventral side is that diagnostic of a position (cervical, dorsal, caudal ect) or of species?

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I believe they are dorsals since I don't see an attachment points for chevrons 

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LordTrilobite
22 minutes ago, Haravex said:

Good stuff can box them off then, the only thing I did want to ask @LordTrilobite that extended bit of the vertebrae on the ventral side is that diagnostic of a position (cervical, dorsal, caudal ect) or of species?

Both if I remember correctly. I think those ventral processes show up on cervical verts in various reptiles, I think this includes crocs and mosasaurs if I'm not mistaking. I don't think any dinosaur has those.

I'm not 100% sure tho.

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7 minutes ago, LordTrilobite said:

Both if I remember correctly. I think those ventral processes show up on cervical verts in various reptiles, I think this includes crocs and mosasaurs if I'm not mistaking. I don't think any dinosaur has those.

I'm not 100% sure tho.

now thats interesting because the only other vertebrae I've seen with this on is dyrosaurus 

https://commons.wikimedia.org/wiki/File:Dyrosaurus_vertebra.jpg

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