EPawsF15 Posted December 20, 2020 Share Posted December 20, 2020 This specimen was taken from a Mississippian deposit in Jefferson county, Missouri. All of the other items I found were easily identifiable, but I have no idea what this is. The "skirt" is interesting. I'm not sure if the material behind the skirt is solid, or if it is just a fragile membrane. I didn't post a photo of the bottom because it is just dirt/rock. Link to comment Share on other sites More sharing options...
Fossildude19 Posted December 20, 2020 Share Posted December 20, 2020 Welcome to the Forum. This looks like a Crinoid calyx/cup. Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
FossilDAWG Posted December 20, 2020 Share Posted December 20, 2020 I agree it is a crinoid calyx. The photos have the calyx upside down. You can see where the stem attached at the base of the calyx, and the "skirt" is the calyx flaring out up to where the arms would have attached. Don 2 Link to comment Share on other sites More sharing options...
EPawsF15 Posted December 20, 2020 Author Share Posted December 20, 2020 Well for crinoid out loud, I would not have guessed that, nor the upside down orientation. Thank you very much for your help. Link to comment Share on other sites More sharing options...
Thomas.Dodson Posted December 20, 2020 Share Posted December 20, 2020 Presumably this is from the Fern Glen site based on the matrix. Synbathocrinus dentatus would be my guess. The following is a link to Kinderhook Faunal Studies V- Fauna of the Fern Glen Formation by Stuart Weller. I used this to identify most of my Fern Glen specimens and your crinoid. https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwiCsZ-Ty9vtAhVKCM0KHUEyDBYQFjABegQIAhAC&url=https%3A%2F%2Fzenodo.org%2Frecord%2F2027197%2Ffiles%2Farticle.pdf&usg=AOvVaw2Zy9gOo0hwsx6qnlKDnuwG 2 Link to comment Share on other sites More sharing options...
EPawsF15 Posted December 20, 2020 Author Share Posted December 20, 2020 Correct, it is from a Fern Glen outcropping. Thanks for the link to the Weller document. I will use it for sure. Link to comment Share on other sites More sharing options...
minnbuckeye Posted December 20, 2020 Share Posted December 20, 2020 How about platycrinus? Image from retail site. Link to comment Share on other sites More sharing options...
EPawsF15 Posted December 22, 2020 Author Share Posted December 22, 2020 I think you nailed it, minnbuckeye. I don't fully understand copyright rules (so I'm not posting any images), but alamy.com has some great images of what this platycrinus beast probably looked like before he passed away. I should dig the fossil out a little more to see if there are any indications of where the arms branched out. Link to comment Share on other sites More sharing options...
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