Eight North Sea bone fragments

[BirdsAreDinosaurs]

Hi all. These are eight bone fragments that I found a couple of years ago on the beach near the Zandmotor, the Netherlands. I realize that most (if not all) of these fragments probably are impossible to id, but any information would be great.

 

 

 

Some additional pictures of fragment 1:

 

Number two has a tiny whole (foramen) in it. Here is an extra photo of the top of the fragment:

 

And some more pictures of fragment three:

 

Number 6 at first sight appears to be part of some kind of disk (2 cm high). One side is very smooth/shiny.

 

Thanks! Any information is appreciated! If you need additional pictures from other angles, let me know.

Edited October 15, 2022 by BirdsAreDinosaurs

[BirdsAreDinosaurs]

One more attempt. Is no 1 perhaps an end of a limb bone? I can't really figure out where to start to compare, so any advice is welcome.

[Mahnmut]

Hi,

the concave end of no.1 made me think skapula or pelvic bone, the socket part of a ball-and socket joint? The tibia does also have concave joint surfaces though, I find it hard to see the broken off portions in that well rounded piece.

The ridge along the cavity of no. 2 looks typical for an artiodactyl cannonbone,

like the one Harry Pristis showed here:

http://www.thefossilforum.com/index.php?/topic/108522-might-this-be-a-cannon-bone-artefact/

 

Best Regards,

J

 

[BirdsAreDinosaurs]

8 minutes ago, Mahnmut said:

Hi,

the concave end of no.1 made me think skapula or pelvic bone, the socket part of a ball-and socket joint? The tibia does also have concave joint surfaces though, I find it hard to see the broken off portions in that well rounded piece.

The ridge along the cavity of no. 2 looks typical for an artiodactyl cannonbone,

like the one Harry Pristis showed here:

http://www.thefossilforum.com/index.php?/topic/108522-might-this-be-a-cannon-bone-artefact/

 

Best Regards,

J

 

Thanks! Yes, it definitely looks like the socket part of a ball-and-socket joint, so good suggestions. Cannonbone seems a good fit too!

[Brandy Cole]

I agree that the joint of No. 1 looks like a scapula.  

I also think No. 2 looks like it could be a metacarpal like a horse cannon bone based on the internal line.  

No. 6's shape vaguely resembles a carpal to me.  I would need to see more views with better detail.

 

Unfortunately, I don't think any can be reliably set down to species, and I think the rest lack any identifying features I would use to identify the type of bone.  I normally need a good end-on view of least one complete joint articulations to reliably identify a long bone fragment unless its shape is extremely distinct in some other way.

Edited October 21, 2022 by Brandy Cole
Left out important description

[BirdsAreDinosaurs]

14 minutes ago, Brandy Cole said:

I agree that the joint of No. 1 looks like a scapula.  

I also think No. 2 looks like it could be a metacarpal like a horse cannon bone based on the internal line.  

No. 6's shape vaguely resembles a carpal to me.  I would need to see more views with better detail.

 

Unfortunately, I don't think any can be reliably set down to species, and I think the rest lack any identifying features I would use to identify the type of bone.  I normally need a good end-on view of least one complete joint articulations to reliably identify a long bone fragment unless its shape is extremely distinct in some other way.

Thanks! Carpal sounds like a good candidate for nr 6. I will make some better pictures later.

 

I knew that id'ing these fragments would be a long shot, but I am already very happy to gain some insight on what types of bones some of these bits are

[sjaak]

These are the usual mashed up Zandmotor finds. It’s difficult to ID such fragments, even more from pictures. Also, it’s better to limit your post to a couple of specimens. 
 

I think frag. 1 is a piece of scapula and agree with 6. being a carpal or tarsal.

 

 

Edited October 22, 2022 by sjaak

[debivort]

Your #2 compares similarly to my probable horse canon bone: