Jurassic stellate structure

[IsaacTheFossilMan]

First post on TFF, hello all! I can't lie though, I've been sneakily perusing this forum for a good year now, learning from other's posts!

 

Anyways... This is a tiny stellate structure found on Jurassic limestone from the Cotswolds, England. Upon first glance, I somewhat childishly assumed it to be asteroidea, but, based on other specimen I've gathered in this area, and the details on it, I'm leaning more towards a Pentacrinite columnal. However, based on the thinness of the structure, its taxophonomy, and the fact that it alone, I'm still unsure.

 

There's also a plethora of other specimen on this bed - for example, to the right of the structure, there's a small Pectinida! Undoubtedly, this was once the seafloor!

 

Please, submit your ideas!

[Tidgy's Dad]

Yes, Isocrinus by the look of it. 

Hello, and a very warm welcome to TFF from Morocco. 

[Ludwigia]

+1 for Isocrinus.

[jpc]

how do you guys differentiate between Isocrinus and Pentacrinites and Pentacrinus?

[IsaacTheFossilMan]

Alright, thanks for the help guys!

[IsaacTheFossilMan]

This is another Isocrinus that I've found in the Cotswolds. I don't need help with identification, I am just incredibly confused as to the flowing cup structure underneath it. If anyone could tell me what it is, I'd be very grateful!

[Ludwigia]

8 hours ago, jpc said:

how do you guys differentiate between Isocrinus and Pentacrinites and Pentacrinus?

You really have a point there. I just jumped at the one without first considering the other and I really can't tell the difference myself. Maybe the OP should just define them as Isocrinida gen + sp indet until someone more knowledgeable tunes in here.

@JimTheFossilMan

[IsaacTheFossilMan]

I usually tend to identify as orders, never really genus or species, especially with water worn and small specimen like this, so I was already going for Isocrinida! Thanks all the same! @Ludwigia