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Posted

Howdy all,

 

I have reason to suspect that this is a heavily crushed stigmaria I found while fossil hunting today.

 

I was in the mammoth cave region of Kentucky in a creek where I found plates of coal up to two feet long as well as this fossil. I also went down into an exposed lake bed of Nolin lake which was down the hill from the site I was at and found several of what I'm guessing are mississippian crinoids.

20240316_182349.jpg

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  • I found this Informative 1
Posted

I would think Stigmaria too.

  • Thank You 1
  • I Agree 5

Life's Good!

Tortoise Friend.

MOTM.png.61350469b02f439fd4d5d77c2c69da85.png.a47e14d65deb3f8b242019b3a81d8160-1.png.60b8b8c07f6fa194511f8b7cfb7cc190.png

Posted

figure from Potonie( out of copyright)

stigmawechselporonietforumgeologischesjah05landgoog_0483.jpg

 

 

 

Posted

I can see what looks like root trace/scars consistent with this being a stigmaria. The blob part presents a real problem though. What is internal, external, proximal, distal in a blob? 

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Posted
2 hours ago, doushantuo said:

figure from Potonie( out of copyright)

stigmawechselporonietforumgeologischesjah05landgoog_0483.jpg

I think a couple of those scars in closer viewing look more like rootlet attachments, the preservation might be obscurring it. Could also be some other things jumbled in that specimen. I dont see a vascular trace and parichnos but thinking maybe a stain which gives the appearance of a 2nd depression/parichnos??

closeupofspecimen.jpg.25ed883c50eb392795984d1b877b3ab8.jpg

possiblestigmariacomparison.thumb.jpg.e9d83aef43b3298d68b22a55c4f53789.jpg

Regards, Chris 

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  • I Agree 1
Posted (edited)
56 minutes ago, Plantguy said:

I think a couple of those scars in closer viewing look more like rootlet attachments, the preservation might be obscurring it. Could also be some other things jumbled in that specimen. I dont see a vascular trace and parichnos but thinking maybe a stain which gives the appearance of a 2nd depression/parichnos??

closeupofspecimen.jpg.25ed883c50eb392795984d1b877b3ab8.jpg

possiblestigmariacomparison.thumb.jpg.e9d83aef43b3298d68b22a55c4f53789.jpg

Regards, Chris 

Would this still determine the specimen as being a stigmaria?

Edited by Fullux
Posted

I took another look at that particular scar and found that the spot you had pointed out is a depression.

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Posted (edited)

Some of you may like this depiction by Goeppert ( NB : public domain / out of copyright)

goeppstrigmatffzeitschriftderde03deut_0611.jpg

Edited by doushantuo

 

 

 

Posted
5 hours ago, doushantuo said:

Some of you may like this depiction

A translation of the labeling please? 

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