Jurassic Oxford Clay invertebrate

[Ossicle]

Jurassic, Callovian, Oxford Clay, Peterborough Member, Yaxley, Cambridgeshire 

 

 

I've found a few of these recently, and been trying to puzzle them out. I had thought they might be crab claws. 

 

Today I found my largest and best preserved one so far. I can clearly see plates, but I haven't found plates on images of Jurassic crustaceans, including in Martill. 

 

What it more looks like is the diagram of Ophiuroids in the book, which is what @JamieLynn, suggested might be the case, due to the plates.

 

I have found brittle star at the site before, but the preservation was very different, not at all pyratised. So I'm wondering if this is Ophiroid, crustacean or something else entirely. If crustacean I was wondering about Thalassinidea, because I find so many burrows.

 

I've attached images of the fossil and images from this article for comparison: https://www.cambridge.org/core/journals/journal-of-paleontology/article/brittle-stars-from-the-british-oxford-clay-unexpected-ophiuroid-diversity-on-jurassic-sublittoral-mud-bottoms/8B34E184DFCF1CEEE275194CE2498B17

 

Any help would be greatly appreciated. The ends I find particularly fascinating.

Edited February 26, 2022 by Ossicle

[Ludwigia]

Unfortunately your photos are not sharp enough for me to be able to make out the details of the fine structures properly, so I wouldn't even be able to hazard a guess at this point.

[Ossicle]

Thank you, I will try again. I'm struggling a bit with this USB camera, I will see if a different one will get a sharper image.

[Ossicle]

I've tried again, combining bits of both cameras, and going in closer. I hope these are better, if more detail is needed please let me know.

 

 

[Ludwigia]

Sorry, but I'm not seeing anything suspiciously like ophiurids or crabs here.

[Ossicle]

Thank you!