Upper Pennsylvanian Micro (2)

[Bullsnake]

Hi all!

Under the presumption these are echinoderm I've been searching for anatomical features, particularly disarticulated crinoid and archaeocidaris of which both are plentiful in the matrix.

In my searching I've been unable to find anything that even remotely resembles these pieces.

Any input is much appreciated.

 

Plattsburg fm. - Hickory Creek sh.

I attached a group photo of some of them I found, followed by 4 select specimens showing each side front and back.

 

For scale, field of view is ~1cm.

 

Group shot

 

Front

 

Back

 

Front

 

Back

 

Front

 

Back

 

Front

 

Back

 

Thank you all!

 

[ynot]

Micro arrowheads! Finely proof there really are fairies and sprites.

[Bullsnake]

6 minutes ago, ynot said:

Micro arrowheads! Finely proof there really are fairies and sprites.

[doushantuo]

I hope nobody quotes me on this ,but are Clathrocrinus ossicles a possibility?

[fifbrindacier]

Tony is in a laughing mood today.

[Bullsnake]

8 hours ago, doushantuo said:

I hope nobody quotes m on this ,but are Clathrocrinus ossicles a possibility?

Thank you, sir! You steered me in the right direction.

While searching images of Clathrocrinus I ran across an old TFF thread...

http://www.thefossilforum.com/index.php?/topic/50397-possible-aristotles-lantern/

I'm going to keep looking at different species as well as the one you mentioned.

Thanks again!

 

[doushantuo]

You mean,parts of the buccal apparatus* of echinoids?

*"Aristotle's Lantern "

[Bullsnake]

18 minutes ago, doushantuo said:

You mean,parts of the buccal apparatus* of echinoids?

*"Aristotle's Lantern "

No. If you follow the thread that's not what they are.

Apparently they are calyx plates/spines of certain crinoid species.

I'll have to try researching now to see which ones are in my deposits, including Clathrocrinus.

[doushantuo]

outtake: