Underwater mushroom creature

[mateosfossils]

This was found in southwest Wisconsin. All the other creatures I'm finding are sea creatures. I know nothing about fossils but something tells me this isn't a mushroom lol. 

[Kane]

Looks to be a crinoid. 

[Fossildude19]

I would go with Crinoid calyx and partial stem as well.

[Rockwood]

9 minutes ago, Fossildude19 said:

Crinoid calyx

Some assembly required.  

Most of the calyx is scattered in pieces isn't it ?

[Fossildude19]

1 minute ago, Rockwood said:

Some assembly required.  

Most of the calyx is scattered in pieces isn't it ?

 

Or the plates are worn away. 

[Ludwigia]

Lots of brachiopod shells on that plate as well.

[Tidgy's Dad]

Yup, bits of strophomenid, I think. 

[Northern Sharks]

I was thinking a small piece of cephalopod with the siphuncle and one or two chambers showing. I have a similar scenario, albeit much larger, from my area.

 

[jpc]

The first two pix are of a crinoid calyx.  An excellent basement excavation find. 

 

[Fossildude19]

12 minutes ago, Northern Sharks said:

I was thinking a small piece of cephalopod with the siphuncle and one or two chambers showing. I have a similar scenario, albeit much larger, from my area.

 I agree, this is a possibility as well.  Thanks for weighing in, Kevin.

[Rockwood]

8 minutes ago, Northern Sharks said:

I was thinking a small piece of cephalopod with the siphuncle and one or two chambers showing. I have a similar scenario, albeit much larger, from my area.

If the flared shape were a septum robust enough to preserve in this way it seems like there would be other remnants of septa seen further up. 

On the other hand it is an odd texture for crinoid columnals. 

[jpc]

I will defer my crinoid ID to the good folks here who know their Paleozoic fossils much better than I do.  

[ClearLake]

My first thought on seeing the pictures was also cephalopod with exposed siphuncle as I have collected some similar ones. I think I see hints of additional septa in the thick part, but I could just be wishing them into existence.    A view of the end of the skinny part could help determine, especially if we see the crinoid columnal pattern (lumen, etc) there. But the preservation could be too poor to see much of anything, even if you could get a good picture of it.