Penn Dixie Crinoid

[Peat Burns]

Does anyone know what part of the crinoid this element is?  Is there enough there to assign a genus?

 

It is 6-sided, and each side has a concavity.  Pictured are top, bottom, and one side view. Scale in mm. Location & geological context in tags.

[Rockwood]

Nodal. Where cirri attached. 

[Mark Kmiecik]

3 hours ago, Peat Burns said:

It is 6-sided, and each side has a concavity.

Looks five-sided to me, but I'm not very familiar with the new math. 

 

Sorry, I just couldn't let that one get away. No disrespect intended, and I hope none taken.

[Peat Burns]

39 minutes ago, Mark Kmiecik said:

Looks five-sided to me, but I'm not very familiar with the new math. 

 

Sorry, I just couldn't let that one get away. No disrespect intended, and I hope none taken.

Actually, you make a good observation.  Apparently I can't count.  It's 7-sided.  5 (not 4, as I incorrectly implied) lateral attachment points (for the cirri) plus the upper and lower attachment points of the stalk columnals.

[Mark Kmiecik]

50 minutes ago, Peat Burns said:

Actually, you make a good observation.  Apparently I can't count.  It's 7-sided.  5 (not 4, as I incorrectly implied) lateral attachment points (for the cirri) plus the upper and lower attachment points of the stalk columnals.

If you turn it upside-down that will make the upside a downside and the downside an upside, giving you two more sides for a total of 9, plus the original up and down and that gets us to 11, and if you order a hashplate on the side, then 12. And of course, I'm on your side so the grand total is 13. Hey, that's a new species, isn't it?