Recently Prepped Crinoid For Identification, if possible

[minnbuckeye]

Back in June, I posted this Burlington crinoid, wondering if it was worth prepping out. Responses were fairly cool except to say it may be worth  a bit of exploration to see. @Ptychodus04 volunteered to give me a hand. He was instructed to put about an hour of work into it and then return the crinoid to me.

 

 

His resulting exposure left me with the nagging question of do I go further. It was not worth professional prepping, so all summer and fall it sat on my desk begging to receive some attention. This week, I grabbed the specimen and kept whittling away at the matrix until I was satisfied.

 

Does anyone have any suggestions on what type of  crinoid I have?

 

 

 

It is LARGE! 11cm long with each of the 3 columns at or a bit over 1 cm wide. It came from the Burlington Formation/ Mississippian, very likely the fish layer that separates the Burlington from the Keokuk.

 

 

A little of the calyx surface features can be seen in the center of the next photo.  The bumpy surface is more prominent in person than can be seen in the picture.

 

 

Finally, as an extra tidbit, there were multiple teeth in the matrix. I saved the ones in this corner.

 

Edited January 7, 2023 by minnbuckeye

[rocket]

looks like a crinoid-root for me

[abyssunder]

Not a crinoid holdfast in my thinking, there are visible pluricolumnals. It looks different than that.

[rocket]

2 hours ago, abyssunder said:

Not a crinoid holdfast in my thinking, there are visible pluricolumnals. It looks different than that.

 you mean in the root?

I am not familiar with the burlington ones, but know some from upper cretacous, reminds me a bit to them