Mazon Creek

[Jones1rocks]

From a flat of specimens identified as from Pit 11.  Mouth looks familiar as that of Achistrum, but no dessication cracks.  Looking to confirm identification.  Thanks!

 

~Paul

[bigred97]

I'm still a newbie at this so don't take me as the final word. But I do think the mouth looks like a sea cucumber, and it's very nice. I'm also used to seeing more desiccation cracks as you stated but perhaps it is not always preserved that way. I'm curious to hear other responses.

[Carl]

Here's a Mazon Creek sea cucumber that agrees pretty nicely with your find.

 

And then there's this: 

 

[RCFossils]

Definitely a sea cucumber with a well preserved oral ring.

[Mark Kmiecik]

Yup, Achistrum. Just not cracked where you would have liked it to, or there isn't much more to see.