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Joe_17

Crinoid stems or something else?

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Joe_17

My fiance' found this in a pile of river gravel. Shes trying to find out if it's a crinoid stem, or a piece of a crinoid or possibly something else. Found in New Haven Missouri .

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Joe_17

IMG_0685.JPG

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Mark Kmiecik

Welcome to the forum.

 

It's not a crinoid. I believe that may be a graptolite, but I'm not an expert, so wait for a few others to respond. 

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Mark Kmiecik

It would help to know the size of this specimen.

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Mark Kmiecik
7 minutes ago, TqB said:

It has an echinoderm feel - is it right that I'm seeing it as an impression? Possibly of part of a blastoid, like this Globoblastus (from https://timescavengers.blog/paleo-live/our-research-explained/):

It does look possible -- in which case it is part of a crinoid.

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TqB
1 minute ago, Mark Kmiecik said:

It does look possible -- in which case it is part of a crinoid.

Blastoids aren't crinoids, though related. I agree size would be useful!

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Carboniferous320
10 minutes ago, TqB said:

It has an echinoderm feel - is it right that I'm seeing it as an impression? Possibly of part of a blastoid, like this Globoblastus (from https://timescavengers.blog/paleo-live/our-research-explained/):

 

5dae129ebb57a_Screenshot2019-10-21at21_14_20.png.e98251a6551c5ce2eff7ab581fbae705.png

I agree with TqB - definitely appears to show part of an echinoderm.  Nice find!!

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Mark Kmiecik
15 minutes ago, TqB said:

Blastoids aren't crinoids, though related. I agree size would be useful!

I always thought they were the "head" of a crinoid. Now I did a bit of research only to find I've been confused for the last 55 years. Well, at least I learned something new today. Makes me wonder how many other misconceptions I have formed over the years.

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Joe_17

Heres a pic of her holding it. The rock itself is about an inch long .

IMG_0711.JPG

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Herb

maybe a cross section of crinoid stem?

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minnbuckeye

IF it narrows towards one end, then maybe a cephalopod with the septal and siphuncle showing  as in this example:

 

The Craigleith Depot @CraigleithDepot 3 Aug 2018

DjtBglkVsAAiU7x.jpg
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erose

Fenestrate Bryozoan!

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Wrangellian

My first impression was echinoid until I saw the age... but I think Tarquin has nailed it or pretty close.

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