Missouri Ordovician Cystoid

[connorp]

I collected this disarticulated cystoid from the Kimmswick Formation (Late Ordovician) in eastern Missouri. Cystoids are well outside my wheelhouse, so I was hoping someone here might be able to help me narrow down an ID, if one can be made at all from what's present. Thanks for any help.

 

 

[Mochaccino]

 

 

I believe these are respiratory structures of a rhombiferan cystoid. They remind me of Glyptocystites multiporus, a species from the Ordovician Bobcaygeon/Verulam Fm. of Ontario, Canada (some examples below). So yours is probably a similar rhombiferan.

https://www.geol.umd.edu/~jmerck/nature/specimens/htmls/glyptocystites53084.html